NiMH
BATTERY FREQUENTLY ASKED QUESTIONS
What do you
mean by "no memory effect" on NiMH batteries?
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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
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What is the average discharge
curve of your NiMH batteries? | Answer
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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
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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.
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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.
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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.
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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. |
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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
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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. |
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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. |
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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.
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