HB4 card no. 5 and no. 7 batteries have 4 tablets per card, 4 tablets are simplified, and the models are no. 5, no. 7, no. 1.9V. Using the latest production technology, with capacity and high power, can be large capacity and high power generation, good sealing performance not easy leakage of liquid leakage, storage time up to 18 months. No pollution to the environment and no centralized recycling.