I recently acquired a Giant E+ Pro 2. I’m pretty new to e-bikes, but I got a good deal on it.

So far I’ve only charged the battery while it’s mounted on the bike. The problem is that I live on the 7th floor, and my bike is stored in a garage on the 1st floor. I can’t fit the bike in the elevator, so bringing it up to charge isn’t really an option.

I removed the battery, hoping I could charge it separately, but the charger I normally plug into the bike doesn’t fit the battery directly. The pins/connectors don’t seem compatible, and I can’t find any official adapter.

Is there a way to charge the battery off the bike, or do I need a specific charger/adapter for this?