12-Pack Tenergy Premium D Size 10,000mAh High-Rate NiMH Rechargeable Batteries

Rosanna l. Jones: Work great 👍

United States on Nov 25, 2023

An_Amazon_Customer: Have ordered many of these Tenergy rechargable batteries for lantern, wildlife cameras, battery-operated diagnostic tools, flashlights, etc. I have had severals of these for 4 years now outside in rough conditions in a webcam and they work great! These rechargeable batteries are much heavier than the big name brands you will find in local stores (I have never found these available locally). These tested right on or just under 10000mAh with multimeter. In the past, I received 2 batteries out of a batch that did not make it 1 year and would not refresh and charge any longer. Also received a couple that were way below their published milliamps right out of the box. Contacted Tenergy directly and they promptly shipped me replacements. From the amount of these I have purchased, the failure rate is quite low for me. Will continue purchasing as long as initial tests with multimeter, full discharge/charge, and longevity continue to look good!

United States on Feb 13, 2022

Jarrett Jackson: Great

Canada on Oct 05, 2021

AmazonCustomer11: I use them in an electronic cat door, and they outlast regular batteries before needing re-charge. This is great because changing the batteries in this door is a pain. The product is exactly as described. I expect they will easily pay for themselves plus reducing waste/garbage.

Canada on Apr 19, 2019

rod Gathercole: last longer than the rest will order more

Canada on Aug 07, 2018

Jimmy Taylor: EVERYONE NEEDS TO READ THIS (SOLUTION TO ERRORS AND LONGEVITY) who has troubles believing these batteries are bad (won’t change showing an error or null). I have many “SMART or INTELLIGENT” chargers (controlled by advanced auto sensing circuits) and IF the battery is drained below a certain point or depleted, sometimes these batteries show an error or simply are not recognized because the intelligence can’t detect a fully dead battery or below a certain voltage.

IF YOU USE A CHARGER WITHOUT THE FULL AUTO SENSING “intelligent” CIRCUITRY, IT WILL CHARGE. I have placed these “supposedly malfunctioning” batteries in a MORE MANUAL CHARGER THAT IS NOT SO SMART (just auto-off) for 10–15 minutes (enough to infuse a certain charge or polarity, then place them back into you smart charger… bingo. THEY ARE RECOGNIZED & CHARGES 100% or the time. Or just leave them in there until charged.

I have used this solution for many years and it works 100% of the time on battery that seem to have errors / unrecognized with intelligent chargers, many hundreds of times. These older more manual chargers just begin charging when you place a battery in them, it doesn’t...

United States on Sep 13, 2017

Thorsten: I own 8 of these great rechargable batteries. They work very well and keep the charge a long time used in a baby mobile. The issue is, that the baby mobile draws a very low current and the batteries get exhaustive discharged and appear dead to the charger. After refreshing, the dead battery seems to be fine. 4 stars because of the high price.

How to refresh a "dead" battery:
I read on a discussion board, you place the "dead" and an equal sized battery in your charger. Take a paperclip and connect the plus(+)-poles of these two batteries. Wait 15 minutes and remove the paperclip. The "dead" battery keeps charging.

Update 06/13/2016: The price is now reasonable. Changing to five stars. The best is, I have bought these batteries 4 years ago and we used them constantly for a crib white noise toy. Now after four years 3 of the eight show signs of fatigue and will not hold the charge much longer. Well worth the price. Go for it!

United States on Jul 09, 2012

TLN: Wow, it's expensive for just 8 batteries!!! It takes forever to charge! I don't know why I even give it 5 stars!? I'll tell you why...it last forever! Well, not forever...but very long. With one charge the batteries last quite awhile. My son's toys uses 4D cells a lot and with the regular brand batteries his toys usually give within a week or two. But when using these...they last over a month! So in the long run, I'm saving a lot of batteries/money. The only draw back is it takes quite a long time to charge or you can say 8-15 hours to fully charge (on a totally discharged battery). Which in a way is OK, not good, but OK, it's not good to rapidly charges your batteries anyway, it will drain the life of it. It will be less useful in the long run. And one other thing make sure you by a decent charger that doesn't over charge your batteries. I have the Ansmann 5207123 Energy 16 Charger which is also one expensive s ucker! But with the Ansmann I really don't have to worry about the batteries being overcharged or it's going to exploded in my face. The Ansmann is one of the safest, easiest, and most comfortable charger I have used. Especially for these highends battery! So protect your...

United States on Feb 17, 2011