I'm confused, you bought a used unit and have 2 out of 3 bad coils. This is odd, very odd. If this was true why wouldn't you want your money back?
Then you tell me the 950 coil is operating correctly with a dead battery. This can not happen. Either the battery or charger works or it doesn't, the battery is good or it isn't. Test with a voltmeter and post the results.
If you bought 2 bad coils, a bad charger, or bad battery or all of these you need to talk to the seller.
I'd like to know how it performed for the seller.
Then you tell me the 950 coil is operating correctly with a dead battery. This can not happen. Either the battery or charger works or it doesn't, the battery is good or it isn't. Test with a voltmeter and post the results.
If you bought 2 bad coils, a bad charger, or bad battery or all of these you need to talk to the seller.
I'd like to know how it performed for the seller.