Tenergy Centura NiMH Rechargeable C Batteries, 4000mAh C Battery, Low Self Discharge C Cell Battery, Pre-Charged C Size Battery, 2 Pack

I own a lot of NiMH batteries ... mostly AAs & AAAs, but I do have a fair amount of C, D and 9V. Tenergy is one of my favorite brands - they tend to provide a great price vs. performance quotient and the LSD - Low Self Discharge - are great to put into items (like radios) that you don't use often, yet you want to ensure that when you do use them they (a) have a charge; and (b) retain power so you don't lose your preset stations and/or clock/timer.From my experience, I would rate these 4000 mAh Tenergy LSD C and the 5000 mAh EBL NiMH C cells as the best in class (of all NiMH C cells). You cannot go wrong with either - and both greatly outperform the Energizer rechargeable NiMHs.Also, don't underestimate the importance of having a good quality Battery Charger. I typically use a Tenergy T9688 Battery Charger & I have an identical C. Crane-branded model as the T9688. If you don't have a decent charger, you won't get satisfactory performance from ANY NiMH battery! Choose a charger that (1) Reconditions batteries; and (2) Can identify batteries with bad cells that need to be discarded (recycled).

Long lasting, rechargeable batteries. 3 years old and still working.

The batteries work as they should. However, when testing them I have not been able to get the 4000 mAH capacity as stated in the description. I am getting in the 2600 mAH range. I guess it will have to do since there are not many rechargeable options for this size of battery. Sucks that it only has a little more capacity than a AA with the same chemistry.

I purchased this product (Tenergy Centura C Size Low Self-Discharge LSD NiMH Rechargeable Batteries), because I wanted to use them in my Mr. Beams MB 980 Motion-Sensing LED Ceiling Light. Previously I have had good experiences with Tenergy Centura AA and AAA cells, which is why I decided to try those C cells in the same series.Those Tenergy C cells are advertised to have a capacity of 4000mAh. Most name-brand rechargeable C cells in the US market have capacity similar to that of a typical AA cell. For example, the Energizer NH35BP2 C cells are rated for 2500mAh only. Higher-capacity C cells are available, but usually at a much higher cost. For example, the Maha IMEDION C cells are rated for 5000mAh, but cost nearly 3x as much as those Tenergy cells.I have tested a pair of Tenergy Centura C cells, using my rigged-up Maha MH-C9000 AA/AAA Battery Charger. Here are my findings:- Right out the package, the average remaining charge capacity is 976mAh, or just 24% of the rate capacity of 4000mAh.- After one charge/discharge cycle, the average capacity improved to 3832mAh.- After another charge/discharge cycle, the average capacity moved slightly to 3848mAh. The spread between two cells is very tight at just 40mAh.The above behavior is very similar to that of other pre-charged batteries I have tested, such as the Sanyo eneloop AA. In contrast, ordinary NiMH cells will take many more cycles to reach its final capacity. Therefore I'm satisfied that those Tenergy cells are indeed low-self-discharge type. The fact that they arrived with only 24% charge could be because they were only partically charged in the factory, just like the case for Sanyo eneloop.Bottom Line:My measured capacity number is about 96% that of the rated capacity of 4000mAh, which is well within the measurement error of my setup. So far I'm satisfied with Tenergy's capacity rating and its 'low-self-discharge' claim. As of this writing, the Tenergy Centurs is priced the lowest among all higher-capacity C cells I can find. That makes it a great value.A note about charger:Most low-cost charger (for example, the Rayovac Platinum AA/AAA/C/D/9V Universal Battery Charger) can't fully recharge NiMH cells greater than 3000mAh, even though they accept C and D cells. You'll need a charger that specificaly says it can handle high-capacity cells, such as the Tenergy Advanced Universal Charger TN190.[Update on Dec 20, 2014]After two years, the four Tenergy Centura C batteries are still working just fine in my Mr. Beams Ceiling Light. I only need to recharge them once every 3-4 months, depending on the season.

These batteries are mediocre, and 80% of typical capacity. Because they are low self discharge, they are great for infrequently used devices, and devices that are at high risk of getting lost, or being used by someone who doesn't get the concept of rechargeable batteries. The low cost makes them break even with alkaline batteries after just 3-5 charges. Less qualms if someone borrows it and doesn't give it back or loses it (flashlights typically). If you want top of the line batteries for capacity, go look for much more expensive eneloop or powerex batteries.

Tried multiple brands of C size NiMH batteries. This is the FIRST one that consistently rates the mAh advertised. Most other brands act like they're just AA cells wrapped in a C size, which is lame.Highly recommended. Don't waste your time on the others.

Got these for use in a battery-powered solar bug-zapper. The device came with Ni-Cd cells, but with the batteries going through either a partial or a full charge-discharge cycle on a daily basis, I thought those would soon die. With these cells, I gave them a good refresh (discharge + recharge) twice, and replaced the cheap Ni-Cd cells. These are much better! The blue light from the zapper is still on when I go to bed. These have great capacity, and really do hold their charge over time.I also have another set in an LED snake/work light. They are dependable enough to have replaced alkaline C's, and allow me to recharge after a moderate use, to be sure I always have the full runtime for a job or if the power goes out. I charge them in my Powerex MH-C808M, and give them a refresh after a couple recharges, or if they have been dormant for awhile, to keep them fresh.These are most comparable to Sanyo Eneloop in terms of low-discharge (though not quite as good), but have a gigantic capacity.These are worth the expense if your need is for low self-discharge, large capacity, durability, useful lifespan, and reliability.