Tenergy Centura 8-Pack C Rechargeable Batteries: 4000mAh Low Self-Discharge NiMH Cells – Pre-Charged and Ready-to-Use for Flashlights and Household Electronics

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.

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.

Lucky me, I got the defective batch as I ordered 2 of the cards and one of four batteries (Recommended by NLee he Engineer) will not charge when the other three are charging in my two month old Tenergy Advanced Universal Charger TN190-4 Channel AA/AAA/C/D/9V Ni-MH Charger with LCD Display and USB Power Outlet that was also recommended by NLee the Engineer- even if I change its charging location. The only way is to charge it alone and even then it does not fully charge. Buyer beware as I am not the only consumer who took a chance on the Tenergy instead of getting Maha PowerEx MHRCI2 "C" 5000 mAh IMEDION "Ready When You Are." Rechargeable Batteries (2-Pack) to get the job done. If you are able and willing to gamble on possibly getting a defect in order to save some money, then this is your item. Personally I needed a dozen more of the C cells for my home and am planning to save up for something else. Best of luck to all. Update Thanksgiving 2013: I have had these for several months now and the defective one has seemed to fix itself and charges with the other 3 at the same time. As a result, I increased my rating from 2 to 4 stars. I will be getting another 4 Tenergy batteries soon to power another hallway light for better visibility at night. Happy Thanksgiving!!

Good

On April 7, 2013 I purchased a Sangean portable radio to take outside while I worked at our berry farm. Work is year round - selling and pruning. If I am working outside so is my radio. The radio takes 4 C batteries. I purchased Tenergy C rechargeable batteries. My radio just started playing for only 1 hour so my batteries were not holding a charge. These batteries lasted a little over 8 years! Needless to say, I repurchased the same brand. My radio still goes out with me on almost a daily basis. I plug it it when I come in and it is ready to go the next day. The batteries are dependable and a great bargain and I would highly recommend them.

Muy buen producto!!

Update: Ordered 4 of these in January of 2015 for use in motion activated LED ceiling light above shower. The batteries have been recharged less than fifteen times. They are now unable to power the LED ceiling light for more than week. My charger is working properly. I just contacted the seller and received this reply: "We have a 30 day return policy and a 90 day warranty for all items. Based on your order record, the items in your order is outside of the warranty period. These batteries can be recharged for up to 500 times with the proper care. There are many external variables that can cause the batteries to no longer work effectively. At this time, we are unable to issue a return/replacement. If we were contacted within the warranty, we would have been happy to issue a replacement." Buyers should understand this seller will make no attempt to work with you after 90 days. For me the fact that they could be recharged up to 500 times means nothing.

These batteries have lasted through many charges and still hold a charge for a good amount of time.

Nouveau produit pour moi Semble OK

Batteries arrived on time and charged up as you would expect. As to quality, only time will tell which is why the rating is rather low. Check back with me in a couple months and maybe I'll be able to give a better rating.

Good value however not as long lasting as brand name.

Works well so far.

2 out of 4 batterie package where open when i got them.