I bought my BionX D500 yesterday and the guy who installed it at the LBS on post told me I shouldnt ride in the rain with it.

Has anyone else with a BionX (particularly D500 kits) ever experienced any issues with riding in light/medium/ monsoon rains? Is there any weather proofing I can do that would help protect my investment?

I was kind of thinking of throwing a shower cap over the battery but it still leaves it open to rain running down the downtube. My areas of concern are the connector to the bike and batttery and the lever on the top of the battery.