I would caution anyone considering buying these batteries. I had bought three and had to return all three because they did not hold a charge. I have since gotten the second batch from the company and they are still bad.
It wouldn't charge inside my zaurus (flashing light) or through the external charger. I'll be calling to request a full refund because I don't want to go through a third batch.
I bought two BLO6 batteries two weeks ago from laptops4less for my 5500. Do not hold charge very long. I was thinking maybe I just need to charge them regularly and they will get better, but two weeks of charges and they still run down quicker than the original. I guess it's a hit or miss thing.