Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
(OP)
I work for a Conservation Organization which is looking to extend the battery life on its digital camera traps. In short, our camera traps use 4 D Cell batteries and we want to attach an external power pack that would provide the equivalent of 50-100 watt hours or highers.
Does anyone have any suggestions?
Best Regards
Jonathan
Does anyone have any suggestions?
Best Regards
Jonathan






RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
Are these traps for humans? Or animals? That is, can you use a solar panel?
If you can then find a small solar panel with charger built in or a small solar panel and a separate charger. Whatever charger you get IT MUST be a good one that either CUTS OFF or drops to trickle charge. This would allow several years before needing a battery change.
Alternatively just get the LA battery of size ~20Ahrs and manually retrieve and charge it twice a year(depending on what your system draws).
Perhaps you can better describe the system.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
I googled "batteries 6 volt sealed lead acid", and the first hit I got out of about 424,000 lead to
http://ww
It looks like 72 watt/hours for 19 volts. It should be compatible with the solar charging panels that itsmoked mentioned.
respectfully
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
A lead acid battery will self discharge enough that you will want to charge it about every 6 months even if it is never used.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
If we need a lighter weight solution, what options are there instead of a LA battery?
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
Do you have a link to the device you are using? Maybe we can give you better specifics.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
ht
http
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
A comparable 70 Wh laptop battery costs over $60, with little, if any, gain in volume or weight.
TTFN
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
Are you complaining about the battery expense or do you need a longer run time?
They have different solutions.
If you just want to save on the battery expense by all means switch to NiMH batteries. They are a much better fit for that service in the first place. Pick up a charger and just cycle the batteries through in rotation. Your battery costs would probably be about (guesstimating) about a 1/10 of alkaline. The down side of NIMH is they self-discharge fairly quickly. That's why it's important to understand your problem in detail. If you visit your cameras monthly NiMH! If you visit them every other month they still make the most sense. Every three months? Not such a great improvement...
If you just need more capacity, then just add another 4- battery pack in parallel to the existing one. Using either type of battery, (But they must be the same types!)
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
http://data.energizer.com/SearchResult.aspx
http://data.energizer.com/PDFs/E95.pdf
http://data.energizer.com/PDFs/NH50-2500.pdf
When coupled with the lower voltage on the NiMH battery, the apparent life is quite short.
There's less of drastic difference in AA batteries, with ampacities roughly comparable. But even then, the lower voltage still makes the them appear to have shorter lives.
Makes you wonder why have NiMH D cell, when the AA has the same capacity...
TTFN
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
http
There are very high capacity NiMH cells on this website too, although the Li-SO2 based cells are probably a better fit to the application.
----------------------------------
I don't suffer from insanity. I enjoy it...
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
Alkaline 300 milliohms
NiMH 3.2milliohms
This is important to charging flash units.
If I drop a set of new alkalies in my camera I can snap about 8 shots before I get a dead battery signal. I can snap 30 shots using NiMH before giving up on the comparison.
But alas, it would be nice to understand palmernet's needs better.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
----------------------------------
I don't suffer from insanity. I enjoy it...
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
RE: Cheapest way to replace 4 D Cell batteries with higher watt-hour optio
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com