What about these?

http://www.batterypower.com.au/products_batteries/nimh/nimh-rechargeable-sub-c-3000-hp.htm

What do you think?

The price looks OK, until you add in the shipping, which adds another 33%

Specs look reasonable, but I see lots of different people are selling them an noone says anything about the brand, which makes me suspect theiy're no-name chinese batteries, and therefore suspect until proven otherwise - Specs are notoriously overblown in the Hobby/RC world.

Even at that, they reccomend a maximum of 9amps for the 3000mah cell, which is pretty low for Featherweight robot use.

It all depends on your application.. sayng "what do you think of these" tempts me to reply with something like "They're yellow"..

A better question would be something along the lines of "Would these be suit a 2wheel drive Featherweight XU1 Drill-powered robot at 12v ?" - learning how to ask the right question is the way to get a good answer.

On the whole, they dont look like a great bargain. If you want proven quality, go for Sanyo's or GP cells. If you're on a budget and your current (power) requirements are low, premade-hobby packs from Ebay would be the next step up from Drill Batteries.
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K thanx. My application for the batteries is a few posts above... Also what do u think would be the max current and voltage the ibc could handle with this setup? Yellow batteries would fine

Those batteries would not be suitable at all then for my scooter motors. I would like to build the pack so i can get it to fit in the bot. The currently available bats from ebay are the 3300 and they seem to be a little heavy. I contacted a master instruments suppler today and they were very expensive. Thoughts ideas? Thanx

You might get away with cheap 1.2A batteries if your run scooter motors... to be honest you can get away with them with anybot without some sort of high drain spinning weapon, although retread uses just them, although its 4 packs worth! Just get some cheap cells so you can build something that works, then worry about upgrades. Best way to get into something is to start doing it
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just jam in a 7ah SLA, they have about the same foot print as a full C brick pack and last just as long. just shove in the proper packs when your ready to spend some money.

as the triangle goes good, cheap or small choose two.
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http://www.youtube.com/user/HyzerGlen - Videoooozzz

Sweet, thanx. A have allready got some cheap nicads from drill packs and a charger coming in the mail. So i will relax for now.

quote:

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Originally posted by assassin:
what do u think would be the max current and voltage the ibc could handle with this setup?

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Intellect 4200HC NiMH packs going on Ebay...

http://cgi.ebay.com.au/Intellect-Highest-4200mAh-7-2V-Batteries-Pack-w-Tamiya_W0QQitemZ6037153455QQcategoryZ84443QQrdZ1QQcmdZViewItem
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https://www.halfdonethings.com/

out of pure curiosity (or something like that ) what would happen if you dropped a battery into distilled water or just tap water.
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

I'm happy to find out glen, i even have a 1200mah cell to donate

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lol im gunna try it when i find out whether itll explode or not
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Nothing happens, not enough electrolytic particals in tap water. I solder my brick packs with 80% of the NiCD cell submerged in water to prevent damaging the cell.
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https://www.halfdonethings.com/

cool, that gives me quite a few ideas then

do you reckon the same applies to motors? or would it just start oxidising the copper windings... but i reckon the heat from the motor would probably just evapourate it.

water cooled robots
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Yeah, heard of those rc boats, that some when they sink it shorts the electronics and the motors power them along like submarines?
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