T
treez
Guest
![Newbie level 1](/styles/images/ranks/alevel1.gif)
Hello,
I am doing an emergency LED light unit. It obviously has a microcontroller in it which runs off the battery.
I am just wondering , if the mains is OFF for several months, then the microcontroller and the control circuitry will keep draining 50mA from the battery (battery is five 5000mAh NiCd cells in series)
Here is the cells used:
**broken link removed**
......how low will the battery discharge to?
....surely an individual NiCd cell will not discharge to less than 0.9V/cell?...even if the micro tries to draw a constant 50mA from it?
Supposing the Nicd cells discharge to less than 0.5V/cell...............how do you recharge such depleted cells, or are they damaged forever?
I am doing an emergency LED light unit. It obviously has a microcontroller in it which runs off the battery.
I am just wondering , if the mains is OFF for several months, then the microcontroller and the control circuitry will keep draining 50mA from the battery (battery is five 5000mAh NiCd cells in series)
Here is the cells used:
**broken link removed**
......how low will the battery discharge to?
....surely an individual NiCd cell will not discharge to less than 0.9V/cell?...even if the micro tries to draw a constant 50mA from it?
Supposing the Nicd cells discharge to less than 0.5V/cell...............how do you recharge such depleted cells, or are they damaged forever?
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