25rs, 3.7 volt rechargeable battery real 2500mah flat battery for for headlamp, camera, led flashlight, etc (4pack)
[application]home automation sensors, door opening detector, temperature sensor, home alarm, bark collar, door sensor, remote control alarm, water meter, electricity meter, gas meter, medical equipment, backup power etc..syi [battery type]li-ion, voltage: 3.7v, capacity: 2500mah [battery size]button battery,size:18*18*65mm, weight: 40g,please confirm the battery size before purchase.