You should not use the charger in the rain or snow. Doing so creates a risk of electric shock. Water getting inside the charger is a serious hazard.
Here's what you need to do for safe outdoor charging:
- Always provide a dry location for the charger. This could be inside a garage, shed, or under a substantial canopy that protects from all moisture.
- If you must use an extension cord to reach that dry location, it must be a cord suitable for outdoor use. The label on the cord will state if it's for outdoor use.
- That outdoor extension cord also needs the correct wire gauge (AWG) for its length to prevent overheating. Refer to the gauge chart: for a 100-foot cord at 120V, you need 14 AWG wire.
If that's not possible, wait until you can move the charger and battery to a dry, indoor location. Never operate the charger with a damaged cord or plug, and don't place it on a soft surface that can block its ventilation slots.
Heads up: Pull by the plug, not the cord, when disconnecting. This prevents damage to the electrical connections.