Q: What are the advantages of the Nickel Metal Hydride battery pack?

• No memory effect
• Higher capacity, smaller size! 50-100% increase in capacity over NiCD battery pack
• Long life, 500-1,000 charge/discharge cycles.
• Light weight
• Environmental friendly
• C/10 Overcharge / reverse polarity protection
• Flat discharge curve: The battery will remain in full voltage in 80% of the usage

 

Q: Can the NiMH battery pack work with the charger from radio manufacturer?

A1: If you have a slow charger or wall adapter:

Maha NiMH battery packs will work with slow charger/wall adapter, or any charging method with a charging rate less than C/10 or 1/10 of battery capacity. Batteries can be continuously overcharged, at C/10 or lower charge rate. This battery also has chemical built-in reverse polarity protection. Also observe the following while using a wall adapter:
 

• If the wall charger / trickle charger goes through the radio, be sure the radio is OFF during the charging.

• If the wall charger goes DIRECTLY to the battery pack, please also administer the following:

• The charge current must be less than 1/10 of the battery capacity. (i.e.: If your battery pack is 1800mAh, then the maximum charge current must not exceed 180mA)
• The polarity of the charger connector is the same as labeled on the battery pack casing, or charging socket protective rubber.

A2: If you have a rapid charger:

Maha NiMH battery packs will work with compatible rapid chargers, with proper termination. Check if your charger meet any of the termination methods:

• Temperature Cut-off termination
• Negative Delta V termination, with 10-15 mV per cell
• Peak Voltage Cut-off

If the charger does not meet any of the above termination methods, Maha battery packs are equipped with built-in temperature cut-off termination. Note that once the temperature rise to 55 degree C, charging circuit will be shut-off. BUT after 1-2 hours, the charging circuit will reactivated, after the temperature drops. It is highly recommended that you use a regular slow charger or wall adapter or use a Maha NiMH / NiCD Charging System.

Q: What is the life of a Nickel Metal Hydride battery pack?

A: If the customer is using a rapid charger (Average charge rate: 1C), they can have about 450-500 charge/discharge cycles. If the customer is using a slow charger / wall adapter (Average charge rate: 0.1C), they will have about 500-700 charge/discharge cycles (Under best environment variable).

Q: Since the capacity is higher, is the case also larger?

A: No. Due to NiMH technology, our battery packs have higher energy density, which means we can fit more capacity in the same size. Some models are even smaller than original manufacturer.

Q: How long will the battery loose its charge, if I don’t use it?

A: Our battery are special designed to hold the charge for about 60-70 days. It is much longer than the traditional Nickel Metal Hydride batteries (about 30 days for traditional one).