The author, theoretically, can try to put a circuit with a controller for a charge-discharge from a Chinese bank, a link to which I cited below. The voltage modes seem to be identical. And the battery capacity is good.
There is one cunning idea .. :)
Expose to your judgment.
In general, there is a goal - do-it-yourself diary bank with minimal investment and maximum use of available material resources.
What do we have?
1. In excess AA AA Ni-MH (Ni-MH namely, not 18650 lithium) capacity ~ 2Ah ..
2. The ability to skolhozit from numerous electronic trash case for consistent installation of 3 AA.
3. Desire to cheat,
to rob the cows
do with your own hands a turn-bank ala "from what was" + a charge-discharge controller circuit with ali, for example,such
4. What confuses? The scheme is designed to work with lithium, we have a consistent metal-hydrite.
We look at the specification of the operation of lithium in the discharge-charge mode and metal-nitride batteries connected in series in the amount of 3 pieces.
So, lithium is done with such protection:
Over current protection / short circuit - 7.5Рђ.
Overcharge protection - 4.25V
Overdischarge protection - 2.75V.
Response time - 20ms
What do we have for nickel?
Discharge to 0.8-0.9V per can, that is 2.75 (0.9 * 3) in the end, and we have.
The charge ends in the mode of 1.4-1.6V (depends on the specific can, for example, the stanchions have a higher voltage in the charged state and mode of operation, which allows using their capacity more fully). Again, 4.25V gives us the same 1.4V * 3. But at the same time, it is possible to charge banks in the intelligent BC-700 and to make them periodically discharge-charge prevention.
At the output, we get a bit cumbersome, but honest, with its 2Ah power bank, which is enough to fully charge the smartphone. A few sets of nickel batteries will allow you to charge the phone equal to their number of times. Profit? : DPost has been editedpromos - 22.01.14, 17:52