Hi all
I have purchase a 12v DC Li-ion battery pack awhile ago. **broken link removed**.
Its current limited, as soon as short occurs it only puts out 2.98v and to reset it, it must be conected to recharger for couple seconds.
The problem im having is its not holding its charge, ive conected a Multimeter across to measure V after recharge and i get around 12V then gradually drops 0.01v every couple seconds. And all that its really running is an LED to show that the unit is on.
I ripped it open an found that the battery on the right has voltage drops every couple seconds and drains down to 2 or so volts. The other two dont change from 3.98v(left) and 4.16v(middle) during use, or after recharge.
Each battery conects to an little IC then to next battery and so on.
below is rough idea of electrical layout. aswell as some photos.
if anyone could explain whats happening here and how i could fix it woulld be most appreciated.
thankyou
I have purchase a 12v DC Li-ion battery pack awhile ago. **broken link removed**.
Its current limited, as soon as short occurs it only puts out 2.98v and to reset it, it must be conected to recharger for couple seconds.
The problem im having is its not holding its charge, ive conected a Multimeter across to measure V after recharge and i get around 12V then gradually drops 0.01v every couple seconds. And all that its really running is an LED to show that the unit is on.
I ripped it open an found that the battery on the right has voltage drops every couple seconds and drains down to 2 or so volts. The other two dont change from 3.98v(left) and 4.16v(middle) during use, or after recharge.
Each battery conects to an little IC then to next battery and so on.
below is rough idea of electrical layout. aswell as some photos.
if anyone could explain whats happening here and how i could fix it woulld be most appreciated.
thankyou