Review on 🔋 Opus BT - C3100 V2.2 Intelligent Digital 4 Slots LCD Battery Charger | Li-ion NiCd NiMh Batteries Compatible | US Plug | Purplish Blue by Ada Adamek ᠌

Before that, I used only regular chargers for AA / AAA / 18650 batteries, and they just somehow charged. Faced with a situation of deep discharge of the battery - normal charging refused to charge (well, or charging had no effect). I've read reviews that not everyone can do this. Well, this one worked :) Got pros: It works well, there are several charging power modes, you can monitor the voltage, etc. Cunningly works with batteries of different types, you can just leave the battery overnight and forget - it will charge to the desired level, and then it will be on support. With its cons. During active charging, the fan may turn on and make noise. Not very strong, but noticeable if the charge is on the table