Anyone use the external battery charger?

[fbrdphreak]

I now have three T4x batteries, and I absolutely have to keep the new 6-cell in good working condition for hard drive battery tests. I also have a brand new 9-cell which I will use primarily when the T42 is not being used for tests, and an older 6-cell which has about 10% wear on it.

Anyone use the external battery charger before? I'm thinking I will use this and keep my testing 6-cell charged so it doesn't get too much wear & tear over time. I can get EPP price on the charger which is nice, but its still near $100 I think.

Thoughts?