Specifications:Model: HX-4S-D22Size: 34.7 * 35.5 * 3.6mmOvercharge voltage range: 4.25-4.35v ± 0.05vOver discharge voltage range: 2.3-3.0v ± 0.05vUpper working current: 10AUpper limit instantaneous current: 20AQuiescent current: less than 30uAInternal resistance: less than 100mΩCharging voltage 16.8..