Built-in smart protective PCB charging module, effectively prevents over charging, over discharging, over current, short circuit. 102050/1000mAh, 102535/950mAh, 103035/1000mAh, 103040/1200mAh, 103048/1500mAh, 103450/2000mAh, 103665/3000mAh, 104050/2500mAh, 400838/100mAh, 402030/200mAh, 402530/250mAh, 402535/350mAh, 502030/250mAh, 502535/450mAh, 503040/600mAh, 503048/750mAh, 523450/1000mAh, 602030/300mAh, 602040/400mAh, 602525/300mAh, 702030/400mAh, 703040/800mAh, 752530/500mAh, 802035/500mAh, 803040/1000mAh, 803450/1500mAh, 902025/400mAh, 902030/500mAh, 102540/1100mAh, 302530/200mAh.