Overnight Charge

• The most cost effective way to charge a NiMH battery is to charge at C/10 or lower.
• Newer cells have an oxygen recycling catalyst which prevents overcharge damage.
• Oxygen recycling cannot meet the needs of charge rate over C/10.
• The minimum voltage required for a full charge depends on the temperature (1.4 volts per cell at 20 degrees C).
• Continued charging at C/10 does not cause venting. The battery might get warm.
• A good charger will switch over to trickle charge after -dV or dT is detected.
• This type of safe smart charging will work on any capacity battery.
• NiMH battery capacity and cycle life will be longest using this charge method.
• It is said that slow charging makes it more difficult to detect -dV or dT.