Hi,
WHAT I HAVE:
I have broken electric drill with battery pack and charger. Drill it self is broken, but batteries are still very good (15pcs ~2-2,5Ah, 1,2V),
so i decided to use batteries and charger for my RC model (car).
EXISTING SOLUTION:
first attempt was to make 5cells in series and such packs in parallel - so i got 6V 6-7,5Ah battery pack. In such case cells are discharged equally and i can to connect those 3x5cell packs in series and plug into original charger.
But it weights too much
WISH:
I wish to use those 5cell packs separately (less weight), but in this case packs will be discharged not equally, and using original charger is not possible.
QUESTION:
So is it possible to remake original charger from 18V (15cell pack charger) to 5cell charger? If yes - i will draw it's circuit and post it here soon (it looks quite simple for me - transformer: 220VAC->~20VAC, ~5 diodes, few resistors, 2x capacitor, 1 relay, probably for starting and auto stopping charging).
p.s. Original charger is very good(fast) with 2,5A charging current, and such fast charger cost a lot, so i do not want to bye new one.
WHAT I HAVE:
I have broken electric drill with battery pack and charger. Drill it self is broken, but batteries are still very good (15pcs ~2-2,5Ah, 1,2V),
so i decided to use batteries and charger for my RC model (car).
EXISTING SOLUTION:
first attempt was to make 5cells in series and such packs in parallel - so i got 6V 6-7,5Ah battery pack. In such case cells are discharged equally and i can to connect those 3x5cell packs in series and plug into original charger.
But it weights too much
WISH:
I wish to use those 5cell packs separately (less weight), but in this case packs will be discharged not equally, and using original charger is not possible.
QUESTION:
So is it possible to remake original charger from 18V (15cell pack charger) to 5cell charger? If yes - i will draw it's circuit and post it here soon (it looks quite simple for me - transformer: 220VAC->~20VAC, ~5 diodes, few resistors, 2x capacitor, 1 relay, probably for starting and auto stopping charging).
p.s. Original charger is very good(fast) with 2,5A charging current, and such fast charger cost a lot, so i do not want to bye new one.