Originally Posted by
Tmarsh34
Anyone know of a 2s shorty with over 5000 mah that weights less than 190 grams in stock? Exalt has a 5200 that weighs 176 grams and Team Powers made a similar pack but I can’t find either in stock. Are there others like this? Also, why do batteries with the same capacity vary in weight so much? An example is the reedy 4800 shorties - they make two of them - one weighs ~205 grams and one weighs 165. The C rating is different but I’ve read that rating is kinda bogus. Do they really have the same capacity? Is the lighter one likely to fade quicker?
Something to consider is if the pack is labeled as HV which means they are overstating the capacity. If you charge the pack at 8.40V then it will offer considerably less capacity than a pack marketed under standard voltage ratings. There is a belief that HV packs will tend to hold higher voltage (punch) throughout the full discharge cycle.
Without doing discharge graphs under load from equally new packs that haven't sat on the shelf for extended periods of time, it will be impossible to judge performance on any brand of battery regardless of their stated specs.
Buying a pack based on weight alone is not worth it if the pack can't deliver the punch you need. Static weight doesn't impact performance nearly as much as rotating mass, that's the area that needs to be highest concern for stock racing, more info here on gains realized reducing rotating mass:
https://www.rctalk.com/forum/threads...on-4wd.136992/
More info here on battery testing performance:
https://www.rctalk.com/forum/threads.../#post-1368906