Quick answer: Reverse wireless charging (Samsung PowerShare and similar names) lets a phone act as a wireless pad for earbuds, a watch, or another phone. Speeds are low — think emergency top-ups, not replacing a wall charger.
Marketing photos show a phone juicing buds on its back. Reality: alignment fiddliness, heat, and enough drain on the donor phone that many owners try it twice and forget it. Still handy once in a while.
This explainer is based on how reverse wireless charging is marketed. Gadget Clash does not measure shared wattage. Compatibility and power limits vary by model.
Reverse wireless charging at a glance
| Question | Short answer |
|---|---|
| What it is | Phone-out wireless power to small devices or another phone |
| Helps most with | Emergency bud / watch / friend-phone top-ups |
| Care most if | You already forget tiny chargers when traveling |
| Ignore if | You carry a power bank and cable anyway |
| Related | Wireless charging, Qi2, battery health |
What reverse wireless charging actually is
The phone energizes its wireless coil in reverse so a Qi-compatible device on its back can charge. Output is typically a few watts — far below modern wired fast charge. Cases on either device can block the link; some OEMs require official cases or raw backs.
Names include Wireless PowerShare, Wireless Powershare, reverse wireless, and similar. It is separate from MagSafe battery packs (those are accessories). Reverse charging will not MagSafe-snap most buds; you still balance devices carefully. Heat rises on both sides — stop if things get hot.
Why it shows up on product pages
- Feature checklists: easy bullet next to wireless charging in
- Ecosystem photos: phone + buds + watch lifestyle stacks
- Parity wars: flagships matching each other’s sharing features
- Travel storytelling: “charge your buds from your phone”
Buyer takeaway: Treat reverse wireless as a rare emergency tool. A small power bank with USB‑C is more reliable for planned travel.
Choose it if / Skip it if
Value reverse wireless if:
- You often have a charged phone and dead buds in the same bag
- You like the option without carrying a second pad
- Your phone and accessories are known to share well
Ignore the bullet if:
- You already carry a power bank
- Reviews show awkward alignment or aggressive heat throttling
- Your priority list is camera, battery size, or updates instead
Sharing power options
| Method | Reality check |
|---|---|
| Reverse wireless | Convenient, slow, heat-prone |
| USB‑C OTG / cable share | Often faster when supported |
| MagSafe / Qi battery pack | Accessory does the donating |
| Wall pad | Best for overnight — not portable sharing |
What you need for reverse wireless to help
- Feature enabled in Battery / Settings on the donor phone
- Compatible wireless-charging buds, watch, or phone
- Cases that do not block coils; remove thick armor if needed
- Patience — expect trickle speeds and some battery loss on the donor
Frequently asked questions
Can I fully charge another phone this way?
You can move some charge, but it is inefficient. Expect slow progress and a warmer donor.
Does it work through cases?
Sometimes thin official cases yes; thick or metal-plate cases often no.
Is reverse wireless the same as Qi2?
No. Qi2 is a magnetic charging standard for pads/phones. Reverse is the phone acting as a donor pad.
Will it hurt battery health?
Occasional use is fine for most people. Habitual hot reverse sessions are not ideal — see battery health.
Related terms
Editorial note: Wattage caps and device pairs differ by OEM. Confirm the Settings toggle on your model. Part of the Gadget Clash Knowledge Base (Phones).