I just bought my new kbox and I really like the design but I have barely been able to use it since I got it a couple days ago. Vendor put battery in, with my tank and it worked great. Obviously battery wasn't fully charged so put in charger. Battery didn't charge so went back to vendor and he gave me another charger. Went home and still no charge. Back to vendor and gave me new battery still no charge. Back to vendor and gave me another battery. Tried it in front of him and then it worked for about twenty minutes then charge low. Could it be that my kbox is shorting out my batteries?