I just ordered some of these from Thomas Distributing. All eight batteries arrived with no charge, under 1v, which is disturbing. The MC-C9000 instantly said "done". The first four have completed the discharge phase of the break-in and show capacities of 2024,1995,1982, and 1967 with voltages of 1.20, 1.21, 1.21, 1.22. After the break-in is complete I will do a refresh/analyze and post the results, unless I should try something different?
Delkin 2300's problems?
- Thread starter Mox
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So I ran a discharge on them at 500 mAh and got 2005,1988,1982,1971 mAh at 1.21,1.21,1.21,1.22 V. It looks like these batteries are very much overrated at 2300mAh. Putting them on discharge again at 200mAh gave an additional 24mAh with voltage dropping to 1.19V. Why is the voltage not dropping to under 1V? Should I keep these batteries or try to return them?
SilverFox
Flashaholic
Hello Mox,
Welcome to CPF.
Many of the 2300 mAh cells seem to come in at around 2100 mAh when discharged at 500 mA. Your seem a little below that, but are close to being in the ball park.
It looks like they are coming up a little, so you may want to run 3 - 5 charge/discharge cycles on them, charging at 1000 mA and discharging at 500 mA to see if the capacity continues to climb. If they get close to 2100 mAh, they should be OK.
Tom
Welcome to CPF.
Many of the 2300 mAh cells seem to come in at around 2100 mAh when discharged at 500 mA. Your seem a little below that, but are close to being in the ball park.
It looks like they are coming up a little, so you may want to run 3 - 5 charge/discharge cycles on them, charging at 1000 mA and discharging at 500 mA to see if the capacity continues to climb. If they get close to 2100 mAh, they should be OK.
Tom
qwertyydude
Flashlight Enthusiast
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- Aug 10, 2008
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500 mah is kinda a high discharge rate. Most manufacturers rate their cells at 100 mah discharge rates. It's kinda misleading, and also some discharge down to .9 volts. Generally if I discharge them at those parameters they meet the specifications.
SilverFox
Flashaholic
Hello Qwertyydude,
I think you are thinking of alkaline cells...
NiMh cells are rated for capacity (and voltage) at a 0.2C load. With a 2300 mAh cells, that works out to 460 mA. 500 mA is pretty close.
The C9000 stops the discharge when the cell voltage is 0.9 volts.
Tom
I think you are thinking of alkaline cells...
NiMh cells are rated for capacity (and voltage) at a 0.2C load. With a 2300 mAh cells, that works out to 460 mA. 500 mA is pretty close.
The C9000 stops the discharge when the cell voltage is 0.9 volts.
Tom
