Comments on: The Best Rechargeable 9 Volt Batteries

By: vaper

vaper — Mon, 29 Mar 2010 08:00:19 +0000

can you run these through a adjustable regulator to work at 3.7-5v? Just curious, I’m a noobie and want 3.7 through 5v but not run 2 rechargable batteries in a series.

By: Best Rechargeable Batteries

Best Rechargeable Batteries — Sat, 13 Feb 2010 12:41:41 +0000

I’m curious about their effectiveness in smoke/carbon monoxide detectors. Those give warnings to change batteries when the battery drops to 7-7.5 volts, which gives them a 30 day lifespan from that point where they’ll beep constantly. For alkaline batteries this is measured almost exactly, but with rechargeables having a longer plateau of voltage before a steeper drop, would these batteries be able to provide the manufacturer’s “minimum safety requirement” for batteries of that 30 day warning time from when it hits 7 volts?

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Cheers!
Jamie

By: Maggie Clarke

Maggie Clarke — Wed, 20 Jan 2010 16:28:31 +0000

I use 9 volt both for the electrics in my acoustic guitar as well as my smoke detector.

By: alan

alan — Mon, 23 Nov 2009 02:27:19 +0000

How do these compare to the 9.6Volt NiMh batteries as far as nominal voltage under load?

I use mine for in ear monitors and lower voltage batteries causes it to think the voltage is too low and the sound drops out and the low voltage light starts blinking.

I know Lithium hold their voltage very well, but I don’t know if its enough to compare to the higher 9.6V.

Nominal Volts of 8.4 of the Lithium is a whole volt lower than the 9.6 Volt of the NiMh.. but I don’t know if “nominal voltage” is that different.

Can you help me in my quest?

By: Don

Don — Wed, 18 Nov 2009 00:10:11 +0000

I’m sure many toys still require 9V batteries but as an adult there are also many applications for 9V batteries, clock radio back-up, all forms of smoke detectors, radon & Co2 detectors, stud finders, telephony toners, both toner and wand. There’s plenty of things out there, just because you don’t use them doesn’t mean someone else doesn’t.

By: Sam

Sam — Sun, 19 Apr 2009 17:52:31 +0000

I own the 500mAh I-Power and they are worth their weight in gold I have had mine for over a year. I use them every day in a portable scale to do inverntory for restaurants 6 days a week and they last about three times as long as a reqular 9-volt and twice as long as a stantard NiMH.
They are expensive at first but they will pay for them selfs. They will hold a charge for months and they charge in 35 mins to 1 hour which is quick for a rechargeable. I speculate they will last as about as long as a computer battery so probable years and they are actually a little lighter than a standerd 9-volt. If you do buy you will be sold on these guys…
P.S. Leave the charge at home I have forgot mine at an account and it was gone the next day.

By: Golden

Golden — Sat, 10 Jan 2009 09:07:05 +0000

I’m Golden from one of the leading battery manufacturers in China.I have read your comments carefully.And I think I should give you a clear answer.
First,about the usage of 9V batteries.You can use them in microphones,smoke detectors,testers,medical machines,etc.
Second,about the compare of Li-po 9v battery and other 9v batteries.Li 9v batteries do have higher energy density,so its capacity is higher than other rechargeable 9v batteries.
Third,about the cycle life.It depends on the charge and discharge methods.The cycle life of li-po and nimh should be almost the same if you use them properly.

If you are interested in discussing about batteries with them,you can add my msn: goldengpb@hotmail.com

I will answer your questions patiently.

By: Justin

Justin — Mon, 29 Dec 2008 19:53:00 +0000

To Power Crazy:

Lithium polymer batteries hold their charge longer than NiMH batteries. Not sure of the exact specs….

Justin

By: Power Crazy

Power Crazy — Sun, 28 Dec 2008 19:53:22 +0000

Do these batteries hold charge well? The smoke alarms in my house use 9V as backup to the mains.

By: johno

johno — Fri, 19 Dec 2008 02:32:11 +0000

and so do many metal detectors