I'm another BL700 user with a brace of them on my desk. Bloody marvellous bits of kit.
Mind you, I still toss a cheap 7DayShop 8xAA fast charger in my kitbag when I'm off to a day-long shoot and I think I might need to get several sets on to charge. Probably does awful things to my cells, but very useful to zap them up to full whack in an hour without needing to press buttons and read LCDs.