What do you think what is batteries rechargable?
Our electronic definitions web site has answer for that as well:
Volts per cell
maintenance free hermetically sealed flat discharge valtage curve with usage Good high/low temp. performance. Resistant to shock and vibratian. Can recharge. High effective capacitance.
Portable power tools opplionces toothbrushes tape recorders radios and colculotors. Photoflash units portoble communication equip. R/C toys