Tenergy AA 1.2V NiMH 2000mAh Flat Top Rechargeable AA Batteries with Tabs, 10 Pack

The batteries died in my 5 foot rechargeable worklight quite a long time ago and I decided to finally rebuild the battery pack in it. Soldered these up and heatshrunk the long 8-battery single length pack together, it snapped right in to the existing clips and turned on just fine. Charging seems to work just fine with the oem charger, of course it takes a bit longer since these are 2000mah batteries and not 1200mah like the oem ones were, but I get about 5 hours run time on high now, where it used to be only about 2 or 3 hours max when this lamp was new (about 15 years ago). Not the greatest lamp as there are way brighter units sold today, but for a few bucks worth of batteries, I'll continue using it until it doesn't work any more! And maybe I'll modify it for new led light strips inside when it does die!!!!

Had three Stanley stick LED flashlights that no longer held a charge for longer than five minutes. Was able to install these in all three using only a soldering gun and electrical tape. All three seem better than new as will stay lit on high for over an hour and a half. Much cheaper than the lights originally cost.

Just the right number of cells to fix a 12v Electroluze ergo Rapido. After about an hour of soldering and assembly/disassembly, I have a better than new vacuum with 2000mah cells instead of the original 1200mah. That should give me 40% more time which was my major issue with this vacuum from the start. It never lasted long enough to do a whole room, just small spots now and then. Now I have a big dog battery life. If you can solder and have patience you can keep your vacuum out of a landfill. The design of the vacuum is great, the battery life was the issue - now I have both.

Used to repair a cordless shaver that was sentimental to my friend, a well-loved wedding gift he never stopped using. He commented that he couldn't remember if it even ran as well while new.

Used these cells to replace depleted ones in a Dremel tool since the manufacturer doesn't offer a replacement battery pack. They fit well, and the tool is back in service. I've bought Tenergy cells in the past and they've provided good life. Would buy again.

These 2000mAh batteries were an excellent choice to replace the handheld vacuum's old 1200mAh originals. The power is restored better then when it was new (2) years ago. I hope these will perform just as well. [edit] Sept 29, 2015 The batteries have 'failed' me about 6mths ago and will not keep enough power the cordless vacuum cleaner. I have yet to test individual batteries from the pack to determine rate of failure. I will also assume the charging function is 'working'. I will update post if I discover differently. Lesson learned: spend more on better quality batteries. I'm reducing my review from 5 stars to 3 stars.

Edit: 18-months since the install, and while these still work, they've probably lost 50% of their capacity in a device that gets moderate use. While not necessarily a deal-breaker, lifespan is somewhat less than impressive. Original review: Used these to replace the ten dying 1,200mAh batteries in a big brand portable vacuum cleaner. The install would have been a little easier if the tabs were tacked on in opposite directions and if the tab holes were a little larger, but not big issues. These batteries were also very slightly larger than the batteries I removed, which made for a tight installation. But this isn't a problem with these batteries. Rather, the device had been designed around some slightly undersized (and low capacity) batteries. Getting these in place consequently required a little internal plastic trimming with an Exacto. The result, however, is that the vacuum now runs better (and perhaps a little warmer) than new. At any rate, I'm happy with these. And the new batteries cost far, far less than the a new vacuum. Just a note for anyone who doesn't realize, these aren't drop-in batteries. Installing them will require soldering, heat shrink insulation, and at least a basic understanding of electricity.

I was asked to replace battery packs in a portable frequency counter. The cost of premade packs are very expensive, but ~$20 for a package of 10 cells and a little time soldering them up I was able to create the necessary packs. In short if you are handy with a soldering iron, you can build your own battery pack and save a lot of money. Note I have used this manufacture's cells, though without solder tabs, before and had no issues with them over time.