Anyone have battery charger monitoring circut plans? Answered
As we all know the biggest problem with cordless power tools is the battery life. One of the biggest reasons for battery failier is because the companies sell the tools with cheap chargers that cook the batteries.
The tools I have use 18v nicad batteries. The chargers are the type that take about 3-4 hours to recharge a drained battery pack. Does anyone know where I could find plans for an inexpensive circut that I could retrofit into the battery chargers to keep them from cooking the batteries?
Idealy a circut that would detect when the battery is almost fully charged and drop down from the 'fast charge' to a 'trickle charge' and eventually shut off completely when the battery is 100% charged.
Be a super nice extra bonus if I could put in a circut that monitored the batteries while in storage, maybe topping them off once a week when I go a while without using them.