Smallpower.com .. nimh batteries, chargers and more
NiMH Batteries

For a Huge Selection of Nimh Batteries and Chargers. Great Prices Too! Visit
Thomas-Distributing

Check out our Monthly Specials / Deals!

NiMH BATTERY FREQUENTLY ASKED QUESTIONS

What do you mean by "no memory effect" on NiMH batteries?    | Answer |

What is the difference between NiMH batteries and "rechargeable alkaline" batteries?   | Answer |

How long will nimh batteries last and what's "mAH" mean?  | Answer |

My Digital Camera uses 1.5V batteries and your NiMH Batteries are 1.2V.  Will they still work? | Answer |

Does temperature effect charging of your NiMH batteries?  | Answer |

What is the average discharge curve of your NiMH batteries?  | Answer |

What are number of charge / discharge cycles I can  expect from your NiMH batteries?  | Answer |

Do your NiMH batteries lose any capacity over their useful life?  | Answer |

How well will your NiMH batteries work in flash units and film cameras?  | Answer |



Question:
How long will nimh batteries last and what's "mAH" mean?

Answer:
mAh": Stands for mili-ampere hours. It measure the capacity of the batteries. For example, a 1000mAh capacity means that the batteries will last for 1 hour if subjected to a 1000mA discharge current.  | Top of Page |


Question:
What is the difference between NiMH batteries and "rechargeable alkaline" batteries?

Answer:
Recently the market has introduced a new type of supposedly affordable rechargeable alkaline batteries. However, they do not compare with NiMH rechargeable technology. The key difference is that rechargeable alkaline batteries can be recharged up to 50 times. NiMH cells can be recharged up to 500 times. 
| Top of Page |


Question:
What do you mean by "no memory effect" on NiMH batteries?

Answer:
Memory is a type of problem that traditional NiCD batteries would develop. You probably have heard that in order to maintain the life and performance of rechargeable batteries, you have to fully drain the batteries before recharging them. Thanks to "memory free" technology featured on NiMH batteries, you can charge them anytime you wish, regardless if the batteries are fully drained or not.  | Top of Page |


Question:
My Digital Camera uses 1.5V "AA" batteries and your NiMH "AA" batteries are 1.2V. Will they still work?

Answer:
Yes,  you can safely use our NiMH batteries without any problems. They can be used in place of your original batteries in almost all digital cameras , film cameras, flash units as well as most other electronic equipment.   | Top of Page |


Question:
Does temperature effect the charging of your NiMH batteries?

Answer: 
Yes, but usually only if charged outside of the optimum temperature range of  0°C to 45°C when Slow Charging and +10°C to 45°C when Fast Charging. See the below for more detail.  | Top of Page |

Typical Battery Charging Performance of NiMH Battery Cylindrical Cells

Standard Charging: Charging at 0.1C standard rate for 14-16 hours will greatly enhance the NiMH battery's service life. Our NiMH batteries can withstand overcharge at 0.1C rate indefinitely. Charging at or below 0.1C rate is suitable across a temperature range from 0oC to +45oC.

Fast Charging: All our NiMH series can be fast charged at rates from 0.5C to 1C. Fast charge termination measures should be employed. These include: Temperature Cut-Off (TCO), Rate-of-temperature rise (dT/dt), negative Delta V (-dV). A timer control set at 105% of nominal capacity can be used as an additional protection. For maximum capacity, a trickle charging can be applied after fast charging. We recommend top-off trickle charging at 0.1C for 2 hours or 0.2C for 1 hour. Fast charging can be done at temperatures from +10oC to +45oC.


Question: 
What is the average discharge curve of your NiMH batteries ?

Answer:
The chart below shows the average discharge rate of our NiMH batteries.  Discharge rates can vary depending on the operating temperature. | Top of Page |

Mhdisch.gif (9575 bytes)


Question: 
What are the number of charge / discharge cycles I can expect  from your NiMH batteries?

Answer:
Under normal conditions you can expect any where from 300 - 1000 charge / discharge cycles from our NiMH batteries.  Cycle Life is dependent upon usage conditions and type of charger used.  | Top of Page |


Question:
Do your NiMH batteries lose any capacity during their useful life ?

Answer:
Yes they do lose some capacity, but it is normally very, very gradual. This is true with all rechargeable batteries, but some have a very high rate loss.  Our Nimh batteries are designed to have a much longer cycle life than older generation Nimh batteries.  Normally after 300 - 400 cycles, capacity will decrease 10 to15%. See the chart below. 
| Top of Page |

battery nimh batteries aa gp nexcell maha Mhcycle.gif (7339 bytes)


Question: 
How well will your NiMH Batteries work in  Flash Units and Film Cameras?

Answer:
Our 1300 mAH NiMH Batteries will all work very well in flash Units, and film cameras as well.  We have many customers who are professional Photographers and are now using only our NiMH Batteries in all their equipment in place of standard AA batteries.
| Top of Page |



  | Back |