The Clip-On Portable Electric Reel Battery is a small, portable battery for your electric reel. However, there is an important tip missing from the included instructions!
Charging the battery is simple - plug it into the supplied charger, and the charger's light will go red. When it is charged (can be up to 8 hours), the light on the charger will turn green.
However, the battery level indicator on the battery unit itself can be a bit of a mystery in operation.
Above that indicator is a red switch under the sealed case. To activate the LED indicator - simply push down on the outside of the case on that button. It might require a little more pressure than you think - but that keeps everything inside that sealed case nice and dry!
Once you push the button, the LEDs will light up for a few seconds, showing you the remaining charge.