Ok, so I went out and bought two of these batteries yesterday. I don't even have the bike or conversion kit yet, but thought I'd get the batteries anyway in case they go up again.
I started charging one of them - and when I went back about an hour later, I noticed a distinct - not very pleasant smell coming out of it. Not super strong, but strong enough to make me worry. The battery was quite warm, bordering on hot on the underside.
Is this normal for a first charge? I got scared and took it off. Three of the diodes light up when I test it. It's cooled down now, but still has the smell close up.
I really don't feel like taking another drive to a B&Q that stocks these as it took me an hour each way, but it looks like I may have to? Or is this smell normal?