Rechargeable Batteries - How long do they last and tell tale signs

savemoney

I have a wii charger that chargers via usb port on wii but because I dont use it that much batteries only charge when wii in on and often batteries are flat when I use it. To avoid this I plug the charger in my pc all time now so batteries are always fully charged

I have heard good things about [SIZE=+0]Ansmann batteries I often have new Nimh batteries that are not lasting even with the new type[/SIZE] Sanyo enelope that come pre-charge even got a Hama battery checker the other week to check condition of batteries

linni wrote: »

Would these be suitable for wii controllers as I have to charge them up every time I am going to use them?

isofa

aliEnRIK wrote: »

Cheers mate

A queery though if I may? You called them a 'delta-v' charger yet I cant see any mention of this on the link. What IS a delta v and how would I know that is one?

Delta-V is ΔV but most web designers can't find the ASCII symbol! So it maybe referred to as -dV, or delta-peak - so that probably appears in the spec somewhere, essentially it means the charger monitors the cell's voltage until is detects a minute change which happens just at the point of full charge, then it switches to trickle charge. Each cell will be different too.

Couple more here: http://www.batterylogic.co.uk/technoline/technoline-i-charger.asp
and here: http://www.picstop.co.uk/Battery-Charger/Ansmann-Energy-16-High-Tech-Desktop-Charger

aliEnRIK

Thank you very muchly isofa

isofa

aliEnRIK wrote: »

Thank you very muchly isofa

You're welcome! :beer:

citycastaways

Hi can I ask someone out there about the capacity of batteries, I have a poloriod pogo printer that will only print 10 pics before the battery marked (7.4v ___ 450mah Li polymer battery) is exhausted
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I have purchased a car charger/adaptor for this unit and now want to power it by using rechargeable batteries, I was looking at getting a battery holder for 8 x AA 2900mah batteries as I was told I would need this for the output power and that it would give me approx 10 times the capacity of the battery in the printer, the problem I have is that most of the new breed of good quality batteries that hold their charge (sanyo Eneloop) only seem to have 2000mah capacity would 8 of these give me enough power or would I need to use 10?
by the way the output on the MAINS adaptor (not the car charger/adaptor) is 9v ___3A LPS
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Hope this makes sense to someone out there as it doesn't to me!!

Any help would be appreciated.

kwikbreaks

I'm not sure if you want to replace the existing battery pack with NiMh cells, use them to charge it, or use them to run the unit by plugging them into the charger socket (whether or not that will work depends on the printer).

Rechargeable batteries deliver ~ 1.2v so you'd need 6 to give 7.2v which would probably be OK to run the printer (but not to charge it).

The advantage of the Eneloop type batteries is that they do not self-discharge so fast as most NiMh batteries so can be kept around a while before use or are less likely to be found flat when you grab your camera for that once in a lifetime shot. Their disadvantage is that they don't come in quite such high capacities as standard NiMh (typically 2100mAh compared to 2800mAh). I would think you'd be better off with the higher capacity especially as there will be a price saving too.

6 2800mAh batteries connected to give 7.2v will only have 2800mAh capacity but that is still nearly 6 times your current 450mAh pack.

Your main problem is going to be making a tidy job of this and getting the correct connector.

8 batteries will give 9.6v which should be OK to recharge the existing pack but it won't be a quick job. If you want to use the NiMh batteries to power the car charger you'll need 10 and there will be an efficiency loss too. Take a look at 12v sealed lead acid batteries (used in burglar alarms)

Richie-from-the-Boro

LIDL were selling Delta-V 's last year for £8, and
I bought two from Maplins for [ sale price ] £13 each which has no 12V supply system but included all here that is 4 round and two PP9, all treat as individuals.

Gaz1980

http://www.geek.com/articles/gadgets/brother-to-replace-aa-aaa-with-shake-to-wake-batteries-20100716/

Brother to replace AA & AAA with shake-to-wake batteries
With the introduction of lithium-ion rechargeable [COLOR=blue !important][COLOR=blue !important]batteries[/COLOR][/COLOR] many gadgets have moved away from using AA and [COLOR=blue !important][COLOR=blue !important]AAA [COLOR=blue !important]batteries[/COLOR][/COLOR][/COLOR]. But for certain devices e.g. a TV remote, these one use batteries are still the norm.
Although rechargeable versions of such [COLOR=blue !important][COLOR=blue !important]batteries[/COLOR][/COLOR] exist, most people still rely on using the [COLOR=blue !important][COLOR=blue !important]standard[/COLOR][/COLOR] one use versions and throwing them away, which is very wasteful. Brother Industries may have come up with an alternative for low-power devices, however.
A new Vibration-power Generating Battery (VpGB) has been created which can be produced in both AA and AAA sizes. Unlike those batteries though, it does not contain a certain amount of energy which gets discharged and then becomes useless. Instead, shaking the battery generates power which can then be used immediately.
So with a VpGB in your remote, all you need do is shake the remote and then use as normal. The battery won’t ever need replacing, and therefore there is no waste until the remote’s life is over.
VpGB’s can’t replace standard batteries completely, but for any device that only needs power occasionally, and consumes no more than 100mW (AAA) or 180mW (AA), they are perfect.
The VpGB is set to be demonstrated at the Techno-frontier 2010 show held from July 21-23 in Tokyo.
Read more at Tech-On!
Matthew’s Opinion
Even if this new battery is only suitable for use in remotes that’s a lot of batteries we won’t be throwing away. A little effort on the part of the user to shake a device, and you have power for the remote for the life of the TV. Sounds perfect to me.
TV manufacturers will jump on this if the price is right as they can advertise the remote as never needing batteries. They can also claim to be shipping a more environmentally friendly solution, which marketing departments love to use if they can.
Would you be willing to shake your remote before use in order to save buying and using wasteful batteries?

citycastaways

Hi Kwikbreaks, thanks for your reply, I want to power the unit itself, the unit battery will remain in place and I have a lead/adaptor that runs from the unit and normally plugs into the car cigarette lighter to power the unit and I assume regulate the voltage/current etc, so what I plan to do is buy either an 8x or 10x AA battery holder, the outlet on them have a PP3 connector, I will then also buy a 12v cig lighter outlet and fit a PP3 plug to it to enable to connect to the battery pack and then plug the lead/adaptor into it? I know it means a few connections but I need to power the printer for 5ish hours (although not continueosly printing) I have looked at the lead acid batteries but feel that with all the other eqp camera's printer etc it would add to the weight to be carried around for 5ish hours, and the other thing is if 1 or 2 of the AA batteries failed whilst I was abroad I could easily & cheaply buy a replacement but if the lead acid battery failed I would be stuffed, I assume 10 x AA would give a voltage of 12v (which the adaptor would regulate) and give 10 x the capacity?
any further thoughts would be appreciated

many thanks

kwikbreaks

I don't know if the charging circuitry is in the printer or in the adaptors. This is important as there needs to be some sort of cut off when the battery is fully charged otherwise it could overheat and then leak or worse.

If the charging circuitry is in the printer then I'd say that 8 cells giving 9.6v would be fine as the mains adaptor supplies 9v. The safest option would be to use 10 cells and run it through your car adaptor but that will certainly reduce to total capacity as the adaptor won't be anywhere near 100% efficient and involves more bits, more connections, and more weight.

If it were mine I'd try 8 and very carefully monitor the battery pack the first few times to check it doesn't get hotter than it does with the proper charger but if you do that and it ends in tears please don't blame me.

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Oh yes - as I mentioned in my original post - if you connect 10 2,800mAh batteries in series to give 12v the capacity of the combined battery pack is still 2,800mAh and NOT 28,000mAh.