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I needed to replace the 1700mAh batteries for a Craftsman 12v drill, 4 battery packs of 10 batteries each = 40 batteries. I know better but I tried knockoffs do to the obvious reasons! The knockoffs said 15pcs Sub C 3400mAh battery but only put out 1300mAh. The rest of the batteries I needed I bought name brands from Tenergy themselves which hurt the pocket book. The name brand said 2200mAh and they tested at 2200mAh! Who knew right? So I have one battery pack that runs slower and drains faster then oem but charges in 1/2 the time of oem. One battery pack that's about the same as oem with normal charge time, and two battery packs that spins and last significantly faster & longer but takes significantly longer to charge. This was a weird lessons because I have two chargers and it's nice to have a variance on charge time during heavy uses, but it still doesn't change the saying; YOU GET WHAT YOU PAID FOR!Read full review
Verified purchase: Yes | Condition: New
soldered the tabs use 250 watt soldering gun. Clean tabs with Dremel stainless steel wire brush were to be solder. Easy to work with. Charged the battery works really good second charge charged faster. Use another set of battery and 3 years later still going AAAA+++ key to battery long life is not to drain the battery all the way down charged the at 70% if can. Keep the battery charged all time. Keep the battery cool between charges. Do not over work the battery, Keep the battery cool. Works for me Dennis in Hawaii, Thanks
Verified purchase: Yes | Condition: New
I have bought batteries from multiple sources for rebuilding my batteries for my tools and have paid some very high prices for some thinking that "you get what you pay for". I've also used some cheaper batteries just to see what I would get well, I'm here to tell you that these batteries out preformed any of the "very high" priced cells that I paid for! I'm telling the truth my friend, I'm very pleased with these batteries and I'm happy to say I found my new supplier!
Verified purchase: Yes | Condition: New
Replaced from bad factory 18v which could last 5 min max of work time to these Tenergy, Really big difference. With them i trimmed grass all my yard and still feels like just charged
Verified purchase: Yes | Condition: New
My weed wacker battery's went dead. New ones cost almost as much as a new weed wacker. I purchased new cells and rebuilt my two battery's for about half the price. The new cells have more amp's and last longer. The first one took me about 1-1/2 hr's to do the second one took about 45 minuets. You need soldering skills and make sure you hook them up like the old battery.
Verified purchase: Yes | Condition: New
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