Tenergy D Size 5000mAh NiCd Button Top Rechargeable Batteries - 16 Pack

Over the years nicad batteries have received a bad reputation. I have found them to be very reliable and tougher than nails if cared for properly. They like to be cycled. Charged to full capacity and discharged completely, then charged to full capacity again. You can turn on and off whatever device they are powering as many times as you like, but just make sure they are mostly discharged before charging them again. Nicads do not do well with being topped off. Cycle them completely and they will serve you well. I have also found that they perform better over time if stored in a slightly discharged state. They can withstand high drain rates, high heat, quick charging and overcharging better than any other battery chemistry I have dealt with. If heavy use is your game, these batteries will claim their fame. I use these in lights, lanterns and boomboxes. They never let me down. Not even in the heat of the summer desert. I recently found a set of 4 aa nicads that had been sitting in the back of my toolbox for three or so years. I charged them up and put them back into service and they have been performing perfectly for almost two years. I highly recommend, especially for extreme use.Update: I have had one cell / battery fail completely. Will not take even a slight charge from my manual charger. Other people have had the same problem. I am going to attempt to contact the company / supplier directly as others have. So far, they have been good about replacing any defective cells for those who contacted them. Will see what the outcome is and post another update when I can.

They hold charge both my x-tar’s show same capacity off by 10 ma between 4 battery’s that good enough for the equipment I go with

I wish they had a longer life as far as recharging goes for use them for portable hot fences it'll last two or three days but then head falls off fairly quick after that every time it's charged it gets less and less. If there's a better battery type out there I would like to know about it.

These are NiCDs, so they aren't quite as good as NiMH ones, but they're cheap. Way better than the Energizer and Duracell D-cells (which usually only have about 2500mah of capacity, they're basically AAs in a D-cell package). These, despite being NiCD instead of NiMH, have about double the capacity of those, and they're priced right.The batteries came pre-charged in the package. All of them have been good, haven't had any fail.

First, I bought 8 (also tenergy brand, centuras) NiMH LSD d cells for flashlights. Then realized they weighed 3lbs, and while they seem to give their advertised 8000mah, boy they're a lot to swing around. So I also got some of these tenergy NiCD d cells, and they're much lighter, a little over half the weight, and seem to be the advertised 5000mah (+/-100 or so). My love for the NiCD chemistry is that they're very forgiving of abuse, and don't sag under load. So when I run them in an incandescent flashlight, it stays nice and white for most of the battery life. And when I forget the same light on and drain them to 0v, when I charge them in the morning they'll come back. Side note, this happened once and one was forced into reverse polarity- the bottom swelled and the polarity stayed reversed... For about a day. The case is still bulged on the bottom, but it recovered after a day of rest and is back to its 5 amp hour self. So that's cool. Nickel cadmium batteries are essentially a solved problem, and they work reliably. Unbiased review from a fan of flashlights and batteries.

they worked as described

I bought 8 of these to try out and they seem to work good out of the package. I only used one with others for use. After use I tried to charge and no go. All of the others worked but this one will not charge. It just gives an error. So I never did get one charge after using it. I will try contacting the company to see if they can send a new one out to me, but I have not had an luck contacting these companies and having them respond or back up their batteries. I will update later if they do...Update - The company has contacted me and has sent me a new battery for the one that went bad. The customer service was good and prompt. I am changing my review to reflect this. I will update again if all is well and no more issues.

one of the best batteries out there I believe they have around a 10 year shelf life so if you're looking for a rechargeable battery to keep in the cabinet for emergencies these are the batteries to have that and still have enough power to run your appliances like battery lantern I prefer the GE 350 lumen lantern you will get a $200 hour battery life with these tenergy batteries in that lantern believe me they are not as strong as nickel metal hydrates butt nickel metal hydrate lose 15% at the very least a year shelf life nicd batteries have a way longer shelf life so like I say for emergencies to keep in the cabinets these are the batteries to have and you can buy a solar D battery charger for $20