25 of 25 people found the following review helpful
Ready When I Am, for sure!,
This review is from: Maha 9500mAh 2-Pack D IMEDION-Ready When You Are-Rechargeable Batteries (Accessory)I purchased these a year ago. They are low-discharge batteries (slow to drain), so I didn't bother to recharge them for six months. When I did do so, they charged up super fast. In other words, they had hardly lost any charge during that time. In another four months, we lost our power, they were used with our lanterns and flashlights. They burned all night without ever going out. When I went to charge them up, they were a bit slower to charge, but they still did so very quickly (as compare to the fast draining Energizers). I am very impressed and that is hard to do, as batteries usually disappoint me.
Tracked by 4 customers
Sort: Oldest first | Newest first
Showing 1-10 of 11 posts in this discussion
Initial post: Jul 9, 2011 5:02:11 PM PDT
Were they REALLY worth $30 for 2 batteries when you can buy Tenergy 10,000 mAh batteries for half that price?
Define "really fast" as far as charging time is concerned?
In reply to an earlier post on Oct 19, 2011 2:03:32 AM PDT
Richard Mahony says:
The principal difference is that 8 pcs of Premium Tenergy D Size 10,000mAh High Capacity High Rate NiMH Rechargeable Batteries, while half the price of the IMedions D-size, are not LSD (Low Self Discharge) NiMH rechargeables.
Standard NiMH rechargeables go flat, ie self discharge, too quickly to be of any use during a power outage unless one has 'em permanently on standby being trickle charged for such an eventuality. You then have to put them in your torch or flashlight - all in the dark of course.
For emergencies, you need long-life non-rechargeables or you need LSD rechargeables already in place in your emergency lights and ready to go.
In reply to an earlier post on Dec 14, 2011 8:40:20 PM PST
Gabriel Morgan says:
The Tenergy batteries are also very cheap. I have be using them in a 3D LED Maglite and the negative ends have caved in so much that the positive terminals can barely touch them and I will have to throw them out soon because they are loosing the connection when used in series. (ie., 3D Mag)
In reply to an earlier post on Dec 15, 2011 4:49:40 AM PST
Last edited by the author on Dec 15, 2011 6:16:24 AM PST
And my Tenergy batteries show NO signs of use, and they have maintained their charge while sitting in my LED 3D Mag-Lite® (Made in USA). I have noticed that the spring in the end-cap is particularly stiff. Perhaps you are LOSING the connection because you have dropped your Mag-Lite, compressing the battery ends. Or perhaps your batteries are just very old, a fact your comments didn't mention.
In reply to an earlier post on Apr 4, 2012 12:01:10 AM PDT
doctor don, when you say show NO signs, how do you test? How long did you let them sit in your LED Mag-Lite before testing capacity? Supposedly, regular Ni-MH batteries loose 1% per 1-2 days in storage; so after about a month, the capacity is down 15-30%.
Have you tested the capacity first with discharging thru a smart charger such as Maha Powerex MH-C808M 8 Cell Multi-Charger for AA/AAA/C/D. And then test after say six months in storage? I wonder how well your Tenergy's compare to these (IMEDION) in the Low Self Discharge specification. Thx!
In reply to an earlier post on Apr 4, 2012 4:56:10 AM PDT
In reply to an earlier post on Apr 5, 2012 12:36:29 PM PDT
Last edited by the author on Apr 5, 2012 12:37:18 PM PDT
Wow, why are you attacking me? I only want to know how much of a drop in capacity the Tenergy's had in comparison to the IMEDIONs. I do not have either battery and was looking to purchase some hi capacity D rechargeables. If you did not test, it is ok. I will try to find the information from someone else.
Also, I am not trying to make you buy a charger.
Oh, and sorry about the mis-spelling of "lose".
And, I did try to thank you in advance for any information you may have had. Sorry for the inconvenience...
In reply to an earlier post on May 6, 2012 5:05:43 PM PDT
Don't be discouraged about comments from people that have contempt for others. He knew what you meant and rather than going on from there, he had to express his contempt and yell it out for everyone to see. I would suspect he is young and hopefull will become more enlightened as he gets older. Still his his knowledge is valuable information and you both are helping me to make a decision. And that is what is important here. Wouldn't you both say.
Oh oh, I feel like I am in the cross hairs now.
In reply to an earlier post on May 9, 2012 9:25:08 AM PDT
17crewchief, thx for your comment. I was able to get more information from another reviewer, NLee the engineer. He has some useful testing numbers across different brand of batteries.
Posted on Dec 26, 2012 8:14:34 PM PST
Tenergy cells are garbage. Very high failure rate and only 3 months of warranty. That explains itself.