DIYers…We have all been through the situation when our high end chargers are busy charging those lithium polymer batteries but you still need to charge that 12v lead acid battery and the only charger you got is a blind one . Yes a blind one as it never know when its killing the battery by overcharging it. Same goes while discharging the battery as you have no idea what charge state it’s at.
Well I have got a solution for that situation as we are going to built a battery capacity level indicator by using a LM3914 IC and we are also going to add an important feature to our existing charger to cut off the charging current when the battery is fully charged.”

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