Review on ⚡️ Enevolt 2in1 Gosy Black USB Battery Charger: Charge AA AAA Rechargeable Batteries & Power Bank by Eric Webbie

I tried two AA chargers available from Revain. Pros and cons in both cases. It charges about as fast as a wall charger and you can use the device while it's charging, AAA batteries can also be used. BUT: it gets very hot, the best charge I got for a Kindle or Galaxy S7 was 50% (sometimes only 25% with AA) or 24% with AAA, after about an hour and especially once it's on When it reaches its peak, it begins to discharge your device. Your device must be monitored to absorb this peak charge. So no overnight charging with this one. The Rayovac is very slow, it doesn't keep up when the power is on, it doesn't discharge after shutdown, but I got a 70% charge in about 6 1/2 hours.