Buttop Top batteryProduct size: 67*18*18 mm (2.56*0.7*0.7inch), voltage: 3.7V.Please confirm the size and model carefully before purchasingSafety and Intelligent 2 Bay Battery Charger2 Individual charging slot can charge 2 batteries at the same time.Multilayer Protectio Built-in intelligent chip can prevent the battery from overheating, over-voltage, etc., which can protect the battery well and make it safer to use.High performance productHigh quality and up to 1000 cycles for your daily needs.Durable, easy to use,Ideal for damaged, missing spare battery.Warm Tips:Please don't charge damaged and inferior battery or incompatible batteries.Please avoid discharging completely Li-ion batteries every time.Battery life for ALL Li-ion batteries is 2-3 years or max 1000 times discharge.Indoor use only, charge at room temperatureUnplug the power source when not in use.Don't disassemble, modify or short circuit the battery and charger.Time required to fully charge batteries depends on the number and capacity.