The latest bootloader tarball available on the installation page has a fix in the uEnv.txt for allowing >500mA through the mini-USB port.
You can also add this to your current uEnv.txt by adding the following command to uenvcmd:
$this->bbcode_second_pass_code('', 'i2c mw 0x24 1 0x3e')
To make it look like this:
$this->bbcode_second_pass_code('', 'uenvcmd=run findfdt; if test $board_name = A335BNLT; then i2c mw 0x24 1 0x3e; setenv mmcde.....')
However, because we know it can draw over 500mA, we recommend using a USB charger that can supply more than this as opposed to a port on a computer.