The real value is choosing something that suits your phone model and use, is safe, and lasts — online cashback is just a bonus on top

Deep dives Published：2026-06-02 Updated：2026-06-21 17 min read

Every accessory type has different priorities — model fit, safety, durability — cashback is just a bonus on top

Phone accessories look like one category, but what matters at purchase differs completely by item. For cases and screen protectors, whether they are model-specific in size is the top priority — if the size is wrong, any cashback you earn is meaningless. For chargers and power banks, safety standards like the PSE mark and the correct spec (output wattage, connector type) come first; choosing on price alone carries heat and fire risks. Wireless-charging-compatible cases need Qi compatibility and charging-speed checks — otherwise a device that supports wireless charging simply won't charge through the case. Cables are consumables you replace repeatedly, so routing online purchases through a point site habitually quietly builds up cashback.

A phone model change is the biggest opportunity to buy everything in one batch — the total is large, and routing the batch together maximizes cashback. But the real value is choosing items that suit your model and use, are safe, and last — cashback is just a bonus on top. This piece covers phone-accessory point-earning by item type, PSE safety, model-change batch buying, wireless-charging pitfalls, and practical steps. Read alongside the model-change & handset guide, electronics-store guide, and wearable & smartwatch guide.

Item-by-item buying guide — cases, protectors, chargers, cables: what to do for each

Each phone-accessory category has different characteristics. Organize by item what to check before buying and how to get cashback through routing.

Item	Top check before buying	How to get cashback via routing
Phone case	Model-specific size, camera cutout and button-position alignment	Route specialty online stores or electronics-store online shops. For folio cases, also check card-slot position
Screen protector / tempered glass	Model-specific cut, sensitivity, fit precision	Route the online purchase. It's a consumable — don't forget repeat buys either
Charger (USB-C / Lightning / MagSafe, etc.)	Matching connector, output W, PD support, PSE mark	Route manufacturer or electronics-store online shops. High-W genuine products have a higher unit price so cashback is more meaningful
Power bank	PSE mark (required), capacity, output, size and weight	Route the online purchase. Large-capacity models have higher unit prices so routing is effective
Cable (USB-C / Lightning, etc.)	Connector type, spec (max current, USB standard), length	Treat it as a consumable and habitually route online purchases every time
Wireless charger / charging pad	Qi standard, charging wattage, placement flexibility	Route the online purchase. Brand products have higher unit prices so routing helps

Always choose "model-specific" for cases and protectors — universal products almost always have misaligned button holes or camera cutouts that make them unusable. For chargers, check whether USB Power Delivery (PD) is supported and whether the maximum output W matches your device's spec — this determines whether fast charging actually works. Cable specs are easily overlooked, but even with the same connector shape, transfer speed and charging current limits differ significantly. "USB-C connector = fast charging" is a misconception. Before buying, check the USB standard (USB 2.0 / USB 3.2 / Thunderbolt, etc.) and maximum current in the spec sheet.

Chargers and cables, especially those that support USB-C and USB Power Delivery, can often be shared not only with your phone but with laptops and tablets, and the way you choose them is the same. Picking by output wattage and standard is the same as for PC peripherals, so considering them together when you stock up reduces waste. How to choose chargers, cables, and hubs for PC peripherals and how to route the rewards is gathered in our PC and peripherals guide, a useful reference if you want to set up a charging environment used across devices.

Chargers and power banks: PSE mark is the minimum — separate safety from cashback

Chargers and power banks are regulated under Japan's Electrical Appliance and Material Safety Act (Denki Yohin Anzen Ho). Selling them requires the PSE mark (diamond ◇ or round ○ shape). Imported products without a PSE mark cannot be legally sold in Japan, so choosing on price alone risks buying unregulated, poor-quality goods.

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Do not buy chargers or power banks without a PSE mark (diamond ◇). They carry risks of heat, swelling and smoke, and are products that violate the Electrical Appliance and Material Safety Act. When purchasing, verify the marking on the product page and packaging, and choose genuine products from trustworthy manufacturers. If you notice heat, abnormal smells or swelling, stop using immediately and dispose of the item in the way your local municipality specifies.

Even when routing through a point site, cashback applies only to the purchase amount — buying a safety-noncompliant product through routing just means you receive the cashback along with the risk. "More cashback = safer" is not true. Choose manufacturer official online stores, electronics-store online shops, or trusted marketplaces (confirm the seller is an authorized dealer) and route through them. Also note that for budget products from unknown brands, the stated rated capacity (mAh) and rated output (W) in the spec sheet may be significantly lower in reality.

Common points to check:

PSE mark (◇ diamond): Specific electrical appliances under the Act require the diamond-shaped PSE mark. Always verify.
Matching connector and output W: Match the output wattage to your device's maximum charging W. GaN (gallium nitride) chip chargers — compact yet high-output — are increasingly available.
Airline carry-on eligibility: Airlines restrict by Wh (watt-hours), so check a power bank's capacity converted to Wh in advance.
Overcharge / over-discharge protection: Confirm whether a protection circuit is built in on the manufacturer's website.

Model-change batch buying — the biggest opportunity in phone-accessory point-earning

A phone model change is the moment to assemble all accessories at once. Buying a case, screen protector, compatible charger and new cable at the same time makes the total large. Whether you route this batch or not determines how much cashback you receive.

Key points for batch buying:

Decide on your model first, then buy accessories: Choose cases and protectors specific to the new model. Accept that accessories for the previous model generally won't carry over.
When the connector changes, review chargers and cables too: If switching from Lightning to USB-C, confirm whether existing chargers and cables will work.
Consolidate the batch buy to one store and one routing click: Spreading purchases across multiple stores means you must satisfy separate routing conditions for each, making it easy to miss one. Consolidating at one online store and routing once makes management simpler.
Decide upfront whether you need a wireless-charging-compatible case: As the next section explains, if you plan to use wireless charging, your case choice changes accordingly.

You can also earn cashback on the handset itself at the same time as the model change. For routing on the handset purchase and carrier switch, see the model-change & handset guide. If you're also switching to a budget SIM, see the budget SIM guide.

Because a bulk purchase at a device upgrade tends to add up to a large total, the rewards you receive also change with how you choose the credit card you pay with. On top of routing points, paying with a high-reward card or a card in your main ecosystem lets you layer rewards onto the same purchase. Which card suits the way you spend is compared in our card ranking guide, so reviewing your payment method before a bulk purchase reduces missed rewards.

Wireless-charging accessory pitfalls — spec, thickness and MagSafe

Even when your phone supports wireless charging, the material and thickness of the case or attached accessory may prevent charging or slow it down. This is a pitfall that rarely comes up in accessory buying, but if wireless charging is part of your daily routine, check in advance.

Metal cases are generally incompatible: Metal blocks Qi electromagnetic induction, so all-metal cases don't support wireless charging. Resin, leather and TPU materials generally allow it to pass through.
Case thickness and charging speed: The thicker the case, the greater the distance between the coil and the device, reducing charging efficiency. Especially with folio-type cases, consider opening the case when using a charging pad, or choosing a thinner case.
MagSafe vs. Qi: the difference matters: MagSafe is Apple's magnet-alignment system; to draw the maximum charging W, you need a MagSafe-certified product. Cheap "Qi2" or "MagSafe-style" products may have their charging speed capped. Before buying, confirm "Is it MagSafe certified?" and "How many W can it charge at maximum?"
In-car mounts with wireless charging: The same case material and thickness constraints apply when using an in-car wireless charging holder. It's common to find a holder stops working after a model change and case swap — take note.

To extend your wireless charging setup to a smartwatch or true wireless earphones, see the wearable & smartwatch guide and earphone & audio guide.

Phone-accessory point-earning — practical steps

① Confirm your model name and connector(s)First confirm your model name and connector (USB-C / Lightning / MagSafe support) and maximum charging W. At a model change, decide on the handset before choosing accessories. Model-change guide.
② Check "model-specific fit, spec, and safety" item by itemFor cases and protectors, confirm model-specific size and camera cutout alignment. For chargers and cables, confirm the matching connector and output W. For power banks, always confirm the PSE mark (◇ diamond). If using wireless charging, also check case material and thickness.
③ Batch-buy through one routing clickAt a model change, consolidate case, protector, charger and cable on one online store as much as possible and route once. Compare routing sites and cashback rates on Pointnavi before clicking through. Electronics-store guide.
④ Route consumables (protectors, cables) on repeat purchases tooProtectors and cables tend to need replacing within months. Make routing online a habit for repeat buys and cashback will quietly add up.
⑤ Pay with a cashback-earning method and consolidate pointsUse an eligible payment method for the batch purchase to stack rewards. Consolidate cashback into your main economic zone and use it before it expires. Touch-payment guide and expiry-prevention guide.

Common failures and how to avoid them

Buying a universal case or protector that doesn't fit: Misaligned button holes or camera cutouts are the classic outcome. Always filter by model name and buy only products that explicitly list your model in the "compatible models" field.
Checking only the connector shape and missing the spec and output W: USB-C connectors span standards from USB 2.0 to Thunderbolt with very different current limits. Using a low-output cable with a fast-charge-capable device means slow charging — nowhere near maximum speed.
Buying a charger or battery without a PSE mark just because it's cheap: Such products fall outside Japan's Electrical Appliance and Material Safety Act and carry heat, swelling and smoke risks. For unknown brand and model products, contact the manufacturer for confirmation or simply avoid them.
Trying to reuse old-model accessories after a model change: Even within the same brand, camera layouts or connectors can change between generations. When the model number changes, set up with dedicated new accessories.
Wireless charging not working even though the phone supports it: The main causes are a metal case blocking Qi induction, a case too thick for the coil to reach, or confusing MagSafe with Qi2. Not being able to charge after a model-change case swap is the classic scenario. Fix it by choosing a thin TPU or resin case, or pairing with a MagSafe-certified product.
Forgetting to route / points expiring: The larger the batch-buy amount, the greater the loss from forgetting to route. Re-click through the point site immediately before entering the purchase screen. Consolidate earned cashback into your main economic zone and use it before expiry. Expiry-prevention guide.

Besides the accessory-specific mistakes listed here, there are stumbles common to point-earning in general — "forgetting to route," "forgetting to cancel a free trial," and "letting earned points expire." Because accessories involve frequent replacement of consumables and high purchase frequency, each missed routing piles up small losses. These common failure patterns and how to avoid them are gathered in our failure-patterns guide, so checking it too gives you peace of mind.

Mini glossary — phone-accessory terms

Knowing the key terms for chargers, cables and wireless charging helps you follow the core priority of this guide: choose items that are safe and fit your model and use case, then earn cashback as a bonus on the purchase. Specs and compatibility vary by product, so check the spec sheet and each manufacturer's official site before buying; for the latest routing deals check Pointnavi.

Term	Meaning	What to check
PSE mark (◇ diamond)	Compliance mark under Japan's Electrical Appliance and Material Safety Act	Required for chargers and power banks
PD (USB Power Delivery) / output W	Fast-charging standard / power supplied	Match to your device's maximum charging W
GaN (gallium nitride)	Material enabling compact, high-output chargers	Advantageous for portable chargers
Qi / MagSafe	Wireless charging standard / Apple magnet-alignment system	Check for certification and maximum W
USB standard (2.0 / 3.2, etc.)	Same connector shape, but speed and current differ	Check max current in the spec sheet
Model-specific (compatible)	Matches the size and cutout positions of your model	Your model must be listed in the compatible models field

Terms and up-to-date compatibility change by product and period. See also the model-change & handset guide, electronics-store guide, and wearable & smartwatch guide.

Frequently asked questions

When is the best time to earn cashback on phone accessories?

The model-change batch buy is the biggest opportunity. You assemble a case, screen protector, charger and cable all at once, making the total large — routing the whole batch through one online store gives you a significant lump of cashback. But confirm model-specific fit, charger spec and PSE mark item by item before buying. For cashback on the handset itself, see the model-change & handset guide.

Does it matter which charger I choose?

Yes, it matters significantly. First confirm the connector (USB-C / Lightning / MagSafe) matches your device, then confirm the maximum output W matches your device's fast-charging spec. Avoid anything without a PSE mark (◇ diamond). GaN (gallium nitride) chip chargers — compact yet high-output — are increasingly available. Routing through manufacturer official sites or electronics-store online shops also earns you cashback.

My phone supports wireless charging but a case stops it from working — why?

Three main causes: ① the case is metal, blocking Qi electromagnetic induction; ② the case is too thick, making the coil distance too large; ③ confusing MagSafe with Qi2 (speed gets capped). A case swap after a model change that breaks wireless charging is the classic situation. Fix it by choosing a thin TPU or resin case, or by pairing with a MagSafe-certified product.

Is a power bank safe if it has a PSE mark?

The PSE mark (◇ diamond) is the minimum bar for sale in Japan. Having it doesn't guarantee absolute safety, but the absence of it means clearly higher risk — always check. Also look at whether it's a trustworthy brand, whether overcharge and over-discharge protection circuits are included, and whether the rated capacity is accurately stated. If heat, swelling or abnormal smells occur, stop using immediately and dispose of it the way your local municipality specifies.

Cables are consumables — how do I route them efficiently?

Cables often need replacing within months to a year due to breaks or poor contact, so routing online habitually on repeat purchases quietly builds up cashback. Confirm the connector type (USB-C / Lightning) and spec (max current, PD support), then either stick to the same store's routing or check cashback rates on Pointnavi before each buy. Including cables in your batch buy at model-change time is the most efficient approach.

Tempered glass or PET (plastic) screen protector — which is better?

The right answer is to choose based on your needs; neither is universally superior. Tempered glass has high hardness, resists scratches, feels smooth under your finger and has excellent clarity — good if you prioritise protection and feel. The downsides are added thickness, the risk of shattering, and difficulty covering curved screen edges. PET (plastic) film is thin, unobtrusive, conforms to curved surfaces and is cheaper, but it scratches more easily than glass. The single most important factor for both is "model-specific cut" — universal sizes misalign camera cutouts and sensor positions and are nearly unusable. Also check whether you want anti-fingerprint (matte) or glossy, whether you need a privacy filter, and whether the film is compatible with under-display fingerprint sensors. Since screen protectors are consumables that need frequent replacement, routing through Pointnavi every time you reorder quietly adds up cashback.

Can I bring a power bank on a plane? How many?

Power banks must generally be carried in your cabin baggage (not checked luggage), and capacity limits are set in Wh (watt-hours). As a general guideline, banks under a certain capacity can be brought in without a count limit, while large-capacity banks above that threshold are limited in number — but the specific thresholds and limits vary by airline and route, so always check the latest official guidance from your carrier. A rough Wh conversion is: mAh ÷ 1000 × voltage (typically 3.6–3.7 V); if the product already shows a Wh figure, use that. Key rules: ① carry on in cabin baggage only (never in checked luggage); ② protect the terminals — e.g. with tape — to prevent short circuits; ③ do not bring swollen or damaged units. If you're buying a new one for a trip, check Pointnavi for routing deals before purchasing to earn cashback.

How can I tell a genuine product from a cheap unknown-brand accessory?

Don't judge on price alone — look at three things: safety markings, whether the manufacturer is real, and who is selling it. ① For chargers and power banks, the PSE mark (◇ diamond) is non-negotiable; products without it fall outside Japan's Electrical Appliance and Material Safety Act — avoid them. ② Check that the manufacturer name, model number and contact information are clearly stated and that an official website and warranty exist (no model number or company info is a red flag). ③ On marketplaces, confirm the seller is the "official manufacturer" or an "authorised dealer", and watch for suspicious review patterns (a flood of five-star reviews in a short period, etc.). Additional trust signals include a specific rated capacity (mAh) and rated output (W), and explicit mention of overcharge and over-discharge protection circuits. Even when routing through a point site, cashback only applies to the purchase amount — it doesn't make an unsafe product safe. Buying genuine products through trustworthy routes such as manufacturer official stores or electronics-store online shops is ultimately the approach with the least downside.

Which shared points should I consolidate the points earned from accessory purchases into?

As a rule, consolidate into the shared points of the ecosystem you use most in daily life (Rakuten Points, PayPay Points, V Points and so on). Because accessories are bought frequently and earn small rewards little by little, keeping them in shared points you have everyday uses for lets you spend them up without letting them expire. Which shared points suit your lifestyle is worth checking in our shared-points comparison guide.

I keep forgetting to route every time I replace cables or films.

Repeat purchases of consumables easily become "add-on buys," so routing is easy to forget. Setting up a "route even if you forget" system in advance — starting access to shops you use often from point-site bookmarks, and using a browser extension that pops up a routing notice — lets you earn rewards naturally each time you replace them. Concrete ways to systematise routing are gathered in our systematising guide.

Compare online cashback for phone accessories → Read the model-change & handset guide

This article was written from publicly available information on each point site as of 2026-06-21. Cashback rates, campaign terms, and redemption rules can change without notice — always check each site's official page for the latest. This site uses each point site's referral program, but going through a referral link never changes the rate you receive.