The Lloytron Compact AA / AAA Battery Charger is compatible with NiMh and NiCd batteries in sizes AA and AAA. Charge 2, 4, 6 or 8 batteries at one time. Simply plug in to a standard UK mains socket and insert your rechargeable batteries into the appropriate sized compartment. The red light will turn on to indicate that 2 batteries have been inserted and leave to charge for the recommended time. There is no indicator to state when the battery is fully charged. Recharge your batteries to their full capacity quickly and safely. The charging rate for AA / AAA is 1.2v DC 100mA. Many rechargeable batteries can be recharged up to 1000 times, providing long lasting power to your everyday devices again and again. Save money and reduce waste without the need for disposable batteries. The over charge protection and reverse polarity protection/automatic short circuit protects the battery against current fluctuation for safe operation.