May 192012

This morning, I put my LP-E6 battery for my Canon EOS 7D camera on to charge in the standard LC-E6E charger, but it did not charge at all.

The charger has a single LED which shows the charging state of the battery. While charging, the LED is orange – it flashes once and pauses when the battery is less than 50% charged, twice and a pause when the battery is less than 75% charged and three flashes and a pause when the charge is less than 100%. Once the battery is fully charged, the LED turns green and lights continuously.

*   *   *   *   *  < 50%
**  **  **  ** ** < 75%
*** *** *** *** *** <100%
******************** = Problem!

When I connected the battery, it flashed orange rapidly with no pause.

To fix the problem, I unplugged the charger, I cleaned all four contacts using a dry duster. There are two copper ‘blades’ and two silver ‘bent wire’ contacts. The charger seems to gather lots of dust. I also cleaned the contacts on the battery taking great care not to touch them with anything conductive. The exposed contacts can be rubbed gently with a cloth, but the two slots which connect to the ‘blades’ on the charger are harder to clean. I folded a clean piece of paper in half and gently pushed it into the slots – there was a small amount of fluff which came out of the slots.

When I put the battery on to charge again, it was showing 50% charged and after a few minutes showed 75%.

I hope this will save you spending £75 on a new battery, or £50 or a new charger!