Sounds like the wrong type of batteries for an airsoft. I had the same problem with a Crane Stock battery pack. Fully charged (no load reading 10.8V) and it had less than stellar performance on my M4.
It was a 9.6V, 2000mAh, Sanyo enerloop (AA size). These things should NOT be sold for airsoft.
Batteries actually have THREE specs 1) voltage 2) current (mAh) and 3) discharge rate. The last is directly related to the battery's internal resistance. Commercial size batteries typically have poor discharge rates/ high internal resistance. Performance batteries have high discharge rates/ low internal resistance. Some of these can deliver burst currents as high as 25-30 amps (25000-30000 mA) with a rating as low as 2000mAh. Commercial stuff is typically as low as 5-10 bursts.
So beware what you buy... A good source and education can be had at cheapbatterypacks.com
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G&G M4 Commando | KWA SR5 | KWA SR10
Last edited by Gorilla War; February 7th, 2009 at 20:06..
Reason: typos
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