Re: Camera zaps NiMH batteries
- From: ASAAR <caught@xxxxxx>
- Date: Wed, 30 May 2007 18:35:44 -0400
On Wed, 30 May 2007 19:29:04 GMT, Thomas T. Veldhouse wrote:
If they stop holding a charge, they've been damaged. I've never
seen a manufacturer that claimed anything less than 500 charge
cycles for NiMH batteries, and many claim 1,000. For the new
pre-charged NiMH batteries, Sanyo says that their Eneloops are good
for 1,000 charge cycles and RayOVac says that one of their Hybrid
batteries is equivalent to 1,500 alkaline batteries.
Actually, Rayovac indicates that the hybrids can do 500 charge cycles, but can
replace 1500 alkaline batteries [indicating 3x performance]. I suspect these
2100mAh batteries will do better than 3x performance as alkalines perform
poorly in high drain applications like cameras.
I thought that I'd seen "500 charge cycles" somewhere, but the
packaging I'd saved from my RayOVac hybrids only mentioned the 1,500
to 1 battery ratio figure. Maybe I saw "500 cycles" on RayOVac's
website. In many cases you'd be correct, that you'd get better than
3x performance, but that's a floating target, and you seem to
already know the reason for it. :) Not all cameras have
excessively high current demands, and for those (such as Fuji's
S5100, S5200, and Canon's A6x0 models, among others), NiMH batteries
don't show as much improvement. Fuji's results indicate that NiMH
batteries will last exactly twice as long as alkalines. Canon's
A620, which has an even lower power drain, doesn't even show that
much greater life with NiMH batteries. It's NiMH/alkaline shot
ratios are 500/350 for the CIPA test, 1,500/1,200 for shooting
without flash and with the LCD off, and for viewing pictures on the
LCD, NiMH and alkaline batteries are good for exactly the same
playing time, 16 hours and 40 minutes.
Compare those 16+ hours with the replay time that my 7 year old
Canon S20 (a power drain if there ever was one) got from its
proprietary NiMH battery pack. This was 50 minutes, and only with a
brand new, fully charged NB-5H battery pack in perfect condition.
The only way I could compare NiMH with alkalines for the S20 would
be to open one of the battery packs and replace the 5 NiMH cells
with 5 AAA alkaline batteries, but I see no reason to try that given
the S20's exceptionally high power drain. Instead of using the CIPA
procedure that produced 500 shots per charge for the A620, where the
flash was used for every second shot, Canon used a less demanding
test for the S20, where the flash was used for only every fourth
shot. And even for that less demanding test, the S20 could only
manage 55 shots per charge. I wouldn't be at all surprised if the
NiMH/alkaline ratio for the S20 was 10x or more.
.
- References:
- Camera zaps NiMH batteries
- From: sw2U
- Re: Camera zaps NiMH batteries
- From: Randy Berbaum
- Re: Camera zaps NiMH batteries
- From: ASAAR
- Re: Camera zaps NiMH batteries
- From: Thomas T. Veldhouse
- Camera zaps NiMH batteries
- Prev by Date: Re: Sending images to Costco, Wal-Mart
- Next by Date: Re: best lens on a P&S?
- Previous by thread: Re: Camera zaps NiMH batteries
- Next by thread: Re: Camera zaps NiMH batteries
- Index(es):
Relevant Pages
|
