... , PDA, Digital camera, portable DVD etc.2. Home appliances: Two-way radio, Walkie-talkie, Electric toys, Electric bicycles, Emergency lighting3. Military ... 3.2V20Ah to assemble difference voltage and capacity battery pack. We also see the battery cell 3.2V20Ah, 3.2v 10Ah.^-^ ... PCM/BMS to protect the battery safety. ^-^ Below is PCM/BMS Photo TOP Sales Lithium 12V Battery Pack 20Ah~300Ah With BMS ...