Comments on: The Best 9V Rechargeable Batteries

By: Anonymous

Anonymous — Sun, 26 Dec 2021 20:23:56 +0000

In reply to joe. I have yet to find anything other than Energizer Ultimate Lithium that works in my smoke alarms. I would love to find a rechargeable alternative.

By: joe

joe — Wed, 24 Nov 2021 20:37:35 +0000

Recahrgeble 9V are either 8.4 (Ni-Mn) or 7.2V (Li) norminal, the max voltage could be more, say 9.8/8.4V.New Amazon basics alkline are likely to be 9.6V.
The smoke alarm won’t work with the 7.2V one, and work shortly with 8.4V one, due to poor design of US smoke alarm.

By: Ryan

Ryan — Thu, 23 Sep 2021 19:26:14 +0000

In reply to Andrew. Hi Andrew, I use 9V rechargeables made by Maximal Power and they last forever in my guitars!

By: Andrew

Andrew — Fri, 18 Dec 2020 23:23:05 +0000

In reply to Tom.

Hi Tom have you found anything decent? I use 9v as a musician and bought some from ipower years ago li-ion and they were crap. Andrew
Justbusking@icloud.com

By: Ed

Ed — Fri, 23 Oct 2020 17:46:34 +0000

In answer to the actual voltage questions, Lithium Ion and Lilthium Polymer are nearly identical.
A single cell (1S) is “labeled” as 3.7V. A 2 Cell (2S) battery is labeled as 7.4V.
However, when charging they are charged to exactly (within 1%) 4.2 volts per cell.
So, when you charge the so called 9 volt, it will stop at 2×4.2, or 8.4 volts.
These batteries should not be discharged much below 3.4V per cell (6.8 volts).

By: Tom

Tom — Sat, 25 Jan 2020 14:35:20 +0000

I bought 2 EBL 9v Lithium Ion Rechargeable 9V batteries, along with the 9V, 5 slot EBL charger. Both batteries outputed a max 8.3 volts at full charge, as tested by a Fluke multimeter. This was insufficient for the device I needed them for, which worked fine with a non-rechargeable, new 9v battery (outputing 9.5V). I tried another charger in case the EBL one was shutting off at the 8.3 volt level, but the second charger only got the batteries to 8.4V. Still no good, got a refund and my search for a true 9V rechargeable battery continues.

By: AARON SCAVRON

AARON SCAVRON — Fri, 14 Sep 2018 05:09:59 +0000

In reply to web master.

a GUITARIST OR MUSICIAN on stage can easily be burning through 3-6, Possibly many more…. 9v. depending on how much wireless gear they have. Almost all musicians will have a few 9v in their gear as a backup even if they have run power chords for everything that can be corded.

so, its practically impossible for a musician to get away from 9v.

By: Michael Czajka

Michael Czajka — Wed, 05 Apr 2017 08:05:58 +0000

In reply to michael dunne.

The Etisan 600 mAh Li-ion batteries are poorly constructed and most fell apart after using them a few times.

I have one that continues to work… but it does not hold as much charge as the EBL.

The Etisan is also on the large side and doesn’t want to fit into the 9V battery space in some devices.

I doubt that the 900 mAh they advertise will provide 900 mAh. Perhaps it will do 600 mAh?
What good is it if it falls apart?
They have some kind of circuitry under the top to stop the battery from overcharging or charging too quickly.
Perhaps that is responsible for it being a bit oversized?

I’m very happy with the EBL.

🙂
P.S. I haven’t found a good charger for Li-ion batteries. All my normal chargers do a poor job. I’d rather charge slowly than quickly but can’t find a good Li-ion slow charger. They all seem to be quick chargers.

By: shirley stolz

shirley stolz — Wed, 29 Mar 2017 09:03:27 +0000

In reply to michael dunne. Where do I purchase 9V rechargeable batteries and a charger. I have a tens unit. Which charger & battery do you suggest.

By: Crow

Crow — Mon, 01 Aug 2016 19:56:24 +0000

There are now some Li-ion rechargeable PP3’s alleged to hold 900mAh, made by Etinesan. Does anyone have any test results to prove or deny the claim? I’m going to look at a couple of those, but I don’t have great expectations for them. I’ve bought 10 of the EBL 600 mAh batteries too, those look like being a much better deal, but I’m not sure whether the voltage will be good enough.

About that battery voltage in general, is there consistency for Li-ion in PP3 format? Most people suggest two cells, only 7.4V, but I have seen a picture of a Saft pp3 that clearly has three very obvious bulges, cylinders that lie across the width of the battery, so assuming 3.6V cells instead of 3.7, gives 10.8V, a little about that of a very fresh Duracell. Three cells would give a much better voltage to mimic a good quality new PP3 alkaline cell, so if Saft do this (and Saft have been making batteries for decades, and usually of types that become major standards taken up by most other firms years after Saft got there), why would two cells be a standard?