If you left your macbook with no power for a long time, its battery will probably refuse both to boot or to charge. For those of you a little experienced in batteries, there will be probably a good hope to bring your batteey back to life using a good balance charger and discharger for lipo, li-fe,li-ion,pb battery and so. You have to open the battery case, use the force but wisely. And you will get to this:
As you can see there are 3 coupled cells (3s 2p). Also the sticker on the case says 10.8 5400mAh.
So our next step is to program the battery charger in order to give this battery an initial charge useful to continue charging it with my mac, normally.
Now connect the batteryto the charger as follows
Then setup your charger to start charging thi battery as follows. Please note that my charger can’ t go over 5 ampere (sufficient for our purposes) :
It should start charging with no problem. Othetwise you have to check connectin or simply your battery is acrually dead. Check also the internal tester wirt the button on the bottom of the battery.
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