|May 06, 2005, 08:12 PM|
need some info on 6 and 12 volt batteries...
1.what are the dimensions on these batteries and a good place to buy them ?
2.what do you use to charge them?
3. will they work with a 6-12 esc?
4. are they better to use then stick packs?
|May 06, 2005, 08:56 PM|
1. Dimensions vary depending on the Amperag of the battery - more Amps = bigger battery. There is a Batteries Plus store in Virginia Beach. Batteries America, AKA Mr. Nicad, has a good supply of bateries. Bulldog Battery is my local supplier of gel cells, they are about 5 miles from my home.
2. You can buy trickle chargers for the 6V & 12V batteries.
3. They will work with any ESC that is rated for that voltage (6 or 12 Volt).
4. That depends on the application. I have a 12V 7AHr battery in my model of USCGC TAMAROA - I've had the model operating in the water for as long as 5 hours on a single charge. Gel cells (6 or 12 Volt) are better suited to displacement hulls, like tugs and trawlers, where you can use a large battery as ballast. For planing hulls, like PT boats, NiCad or NiMH stick packs are better.
|May 06, 2005, 09:02 PM|
Joined Nov 2004
The dimensions tend to vary a bit according to who makes them. On the average the 6 volt 'gellcell' batteries I use are about 2" x 3" x 4.5", give or take a bit. The one 12 volt battery I have is approximately the same size.
The 6 volt batteries I get from 'Hobby Lobby' or 'Tower', the 12 volt battery from the local Radio Shack. There are other sources, just depends on which is 'best' for you.
The 'gellcell' batteries I charge with a trickle charger (6/12 volt). Usually takes some time longer than a nicad/nimh, but they are both 4Ahr rated, not bad.
If you want to use a 12 volt battery, get'a hold of a 12 volt ESC. The EASCs I use with 6 volts are rated for 7.2 - 8.6 volts, so handle 6 volts fine. They will not handle 12 volts.
Are 'gellcells' better than 'stick' batteries? Biggest different is in weight and capacity. If the weight isn't too much, they ought to work okay (sorry, I don't remember what they weigh). Gellcells usually take longer to charge, so that may be a consideration for you.
I don't have a problem with gellcells in scale boats (depends on the size of the boat though!)...
|May 06, 2005, 09:34 PM|
i was thinking of using one in a 25 inch midwest harbor tug, would this be too much? also could you recommend a few chargers i can look into. thanks.
|May 06, 2005, 11:31 PM|
Joined Mar 2001
The Cyclon cell, http://www.dmstech.co.uk/cyclon.htm , may be an interesting compromise. They have less capacity than modern NiMH cells but their 2 V per cell instead of 1.2 V partly compensates. I think the Robbe catalogue lists the monoblock versions for boat use.
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