Single cell overcharge protection voltage: 4.25+-0.05V Single cell overdischarge protective voltage:2.5+-0.25V Overcurrent protection:40A Charging current:1-2A Colour: blue Material: plastic Size: 36 x 33.5mm Package Contents: 8 x Lithium Battery Protected Board Notice: 1. The products are constantly updated and improved, and some small components are changed from time to time, such as resistance and diode, but it not affect the use!Cannot as the condition that opens dispute! 2. Only the ,Battery not including! Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.