Rechargeable Ni-Mh Batteries - AA Cell Size (2900mAh) - Pack of 20 - £19.95 @ 7dayshop
5 packs of 4 x 2900mAh Rechargeable batteries. Each pack complete with protective, modular cases for under £20 delivered to your door
supplied with a FREE plastic (semi-transparent) storage case
I bought some of these a while ago and they are thicker than normal aa's
they wont fit in some compact devices
- Billy Congo
All Comments (58)
Jump to unread Post a Commentyou dont have kids do you
I would have said the same question six months ago, but every toy needs batteries!!
Used them for the last few years as a professional photographer, work great. I have about 20 sets :)
Most rechargeables are 1.2 volts, not just the cheap ones.
Most rechargeables are 1.2 volts, not just the cheap ones.
"The voltage for rechargeable batteries is more consistent than that of regular batteries
Even though alkaline batteries are rated at a nominal 1.5 volts, they only deliver 1.5 volts when they are fully charged. As they begin to discharge the voltage of alkaline batteries continuously drops. In fact, over the course of their discharge, alkaline batteries actually average about 1.2 volts. That's very close to the 1.2 volts of a NiMH battery. The main difference is that an alkaline battery starts at 1.5 volts and gradually drops to less than 1.0 volts. NiMH batteries stay at about 1.2 volts for most of their discharge cycle."
Most rechargeables are 1.2 volts, not just the cheap ones.
"The voltage for rechargeable batteries is more consistent than that of regular batteries
Even though alkaline batteries are rated at a nominal 1.5 volts, they only deliver 1.5 volts when they are fully charged. As they begin to discharge the voltage of alkaline batteries continuously drops. In fact, over the course of their discharge, alkaline batteries actually average about 1.2 volts. That's very close to the 1.2 volts of a NiMH battery. The main difference is that an alkaline battery starts at 1.5 volts and gradually drops to less than 1.0 volts. NiMH batteries stay at about 1.2 volts for most of their discharge cycle."
Interesting. I've got a set of brand new Energizer rechargeables (1.2v) that don't work with my Wiimotes, any idea why? Non-rechargeables work fine.
For that you need to buy this type: http://www.hotukdeals.com/deals/8-x-nimh-rechargeable-low-discharge-stay-ready-batteries-10-50-vapextech/952263
And use the charger here: http://amzn.to/n2pqzZ
Edited By: richto on Jul 17, 2011 22:30: .
I think you are confused. Alkalines are 1.5V only when fully charged, and 0.9 Volts when nearly discharged.
NiMh are ALL ~ 1.45 Volts when fully charged, and are 1.25V for the majority of their discharge life.
NiMh can also supply much higher currents due to lower internal resistance without effecting total battery capacity, whereas alkaline batteries will loose significant capacity at higher current loads.
Edited By: richto on Jul 17, 2011 17:15
and smoke alarms warn you when the battery gets low! DOH!
Not keen on being woken by that annoying noise they make when the batteries go flat, especially at 3am. Think I stick to standard batteries with a longer life and just change them every six months. Would be a shame if the rechargeable suddenly went flat just as the fire starts. DOH!
"a problem with rechargeable batteries is a rapid voltage drop at the end of their useful charge. This is of concern in devices such as smoke detectors, since the battery may transition from "charged" to "dead" so quickly that the low-battery warning period from the detector is either so brief as to go unnoticed, or may not occur at all."
DOH! - you do realise these will probably be better than most alkaline batteries!
"The self-discharge is 5–10% on the first day and stabilizes around 0.5–1% per day at room temperature"
So worse case It will be totally dead in 3 months just in storage, let alone in use.
So unless you charge them more frequently than every couple of weeks, the lower capacity batteries I linked to above will actually give you a greater useable capacity...
Edited By: richto on Jul 17, 2011 18:04: .
DOH! - you do realise these will probably be better than most alkaline batteries!
what are you talking about? as has been said repeatedly, standard NIMH batteries - which these appear to be - self discharge quickly (i forget the exact % - guy above posted it) so are not suitable for low drain apps like remotes and alarms.
for that you need New Tech/Hybrio type or standard alkaline..
these are good for things that need lots of power quickly e.g. cameras, toys
Edited By: Smiff on Jul 17, 2011 17:31
For that you need to buy this type: http://www.hotukdeals.com/deals/8-x-nimh-rechargeable-low-discharge-stay-ready-batteries-10-50-vapextech/952263
battery test Note where vapertech comes againt 7 dayshop.
people with remote controls, bike lights, smoke alarms, etc etc!
bit of a silly comment really!
"Silly comments" here's a very silly one......
"people with remote controls, bike lights, smoke alarms, etc etc!"
Using rechargeables in a smoke alarm is a definite no no(unless they are the Eneloop type) they're also not that great in remote controls.
utter crap as per usual!
I have some in my Logitech universal remote and havent had to recharge even after 6 months use.
and smoke alarms warn you when the battery gets low! DOH!
i have logitech remotes with non rechargables in them which haven't had them changed in 3 years...so really what he was saying wasn't crap.
You just got called out and can't face it.
Anyone that purchased these have a C9000 charger and can tell us how bad they really are?
Edited By: richto on Jul 17, 2011 17:46
people with remote controls, bike lights, smoke alarms, etc etc!
bit of a silly comment really!
"Silly comments" here's a very silly one......
"people with remote controls, bike lights, smoke alarms, etc etc!"
Using rechargeables in a smoke alarm is a definite no no(unless they are the Eneloop type) they're also not that great in remote controls.
utter crap as per usual!
I have some in my Logitech universal remote and havent had to recharge even after 6 months use.
and smoke alarms warn you when the battery gets low! DOH!
i have logitech remotes with non rechargables in them which haven't had them changed in 3 years...so really what he was saying wasn't crap.
You just got called out and can't face it.
this is getting boring :|
people with remote controls, bike lights, smoke alarms, etc etc!
bit of a silly comment really!
"Silly comments" here's a very silly one......
"people with remote controls, bike lights, smoke alarms, etc etc!"
Using rechargeables in a smoke alarm is a definite no no(unless they are the Eneloop type) they're also not that great in remote controls.
utter crap as per usual!
I have some in my Logitech universal remote and havent had to recharge even after 6 months use.
and smoke alarms warn you when the battery gets low! DOH!
You seem to be in a minority of one as per usual DOH!.............So stop making a prat of yourself and grow up!
Edited By: SHOWMAN36 on Jul 17, 2011 18:12
they are good batts though...
Edited By: Billy Congo on Jul 17, 2011 19:43