Forums

NiMH charger recommendations?

Started by DaveC April 4, 2012
"Mr.CRC" <crobcBOGUS@REMOVETHISsbcglobal.net> wrote:
> William Sommerwerck wrote: >> I own an Energizer CHM4FC, which you can get for around $25. It handles AAA, >> AA, C, D, and 9V. There's a NiCd / NiMH switch for cell type. I use it for >> 5400mAh C cells, and it works fine. >> >> http://data.energizer.com/PDFs/chm4fc.pdf >> >> The catch is... The maximum charge current is ~ 500mA, and you have no >> control over what the charger does. >> >> Get a MAHA PowerEx MH-C9000. It does only AA and AAA cells, * but you won't >> regret it. You can pick the charge rate, and there are functions (such as >> refresh and capacity) not on simple chargers. You can see exactly what's >> going on. >> >> http://www.thomasdistributing.com/Maha-Powerex-MH-C9000-AA--AAA-Battery-Chargerbr_p_134.html >> >> The current $52 price seems high (I have two, purchased at around $40 each), >> but Thomas occasionally has sales. >> >> >> * MAHA told me it has no intention of making a C adapter. Rats. > > I have that MAHA charger and it can't correctly discharge Sanyo Eneloops > (I think they have a little higher impedance than other cells) and the > charger uses some horrible high current pulse mode. > > Then on charge one day it put >3.6Ah into one of my 2Ah cells. I don't > use it anymore. > > Then again, I have had troubles with the Lacrosse BC-900 type chargers > too. Only they just break after a while, but work Ok in general. > > There are also hobby chargers. I have a Thunderpower at work for some > LiPo cells. > >
Been using this one, love it. http://www.lsdbattery.com/chargers/maha-mh-c801d-eight-cell-1-hr-charger/ Greg
> Been using this one, love it. > > http://www.lsdbattery.com/chargers/maha-mh-c801d-eight-cell-1-hr-charger/ > > Greg
And...?
notme <notme@notme.org> wrote:
>> Been using this one, love it. >> >> http://www.lsdbattery.com/chargers/maha-mh-c801d-eight-cell-1-hr-charger/ >> >> Greg > > And...?
Love it. Greg
> notme <notme@notme.org> wrote: >>> Been using this one, love it. >>> >>> http://www.lsdbattery.com/chargers/maha-mh-c801d-eight-cell-1-hr-charger/ >>> >>> Greg >> >> And...? > > Love it. > > > Greg
Because...?
Battery capacity is proportional to volume, which for a cylinder is 
proportional to the radius squared. You make the battery slightly 
bigger, you get a lot more capacity. If something needs to be thin, 
better to just engineer it to run on rechargeable lithium ion or variants.

So the capacity of the AA is greater than that of the AAA, and at the 
same time is about 30% cheaper. You gain both ways.

If you look at say external battery holders for high end cameras, they 
use AA cells. If you are a photojournalist working in some hell hole, 
you can always get AA cells. GPSs use AA cells. Basically items where 
you really need it to work run from AA cells.

In every country on the planet, there are AA cells, AK47 ammo, chickens, 
and rental women.


On 2012-04-08, miso <miso@sushi.com> wrote:
> Battery capacity is proportional to volume, which for a cylinder is > proportional to the radius squared. You make the battery slightly > bigger, you get a lot more capacity. If something needs to be thin, > better to just engineer it to run on rechargeable lithium ion or variants. > > So the capacity of the AA is greater than that of the AAA, and at the > same time is about 30% cheaper. You gain both ways. > > If you look at say external battery holders for high end cameras, they > use AA cells. If you are a photojournalist working in some hell hole, > you can always get AA cells. GPSs use AA cells. Basically items where > you really need it to work run from AA cells. > > In every country on the planet, there are AA cells, AK47 ammo, chickens, > and rental women.
Even Vatican City? I mean I'm fairly sure the Swiss Guards don't use AK47s :) -- &#9858;&#9859; 100% natural --- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---