"I AM VERY DISSAPOINTED. I ordered this battery with high expectations, but when I got it, the fire rate it produced was extremely underwhelming. Immediately after receiving it, I plugged it in and charged it with my Intellect Volt Universal Charger, followed all instructions to a T, and proceeded to plug the battery into my g&g g2010 (F2000). The fire rate was worse than that of an 8.4 volt battery in a Walmart M16. I contacted Airsoft Megastore about the issue, but was informed that I would be unable to return the product unless I could provide proof of its malfunction. 4 and a half weeks later ( just after the useless warranty expired) the battery ceased to work all together. I now cry myself to sleep every night listening to "Total Eclipse of the Heart" by Bonnie Tyler. (The F2000 was brand new also)"