Sounds like it would do the job then
10.15v would be for a 7 cell pack, 11.6v would be for an 8 cell pack
Around 11.6v is what your pack will be when fully charged
The battery capacity divided by the charge rate will tell you how long it will take
800 / 165 = 4.8 hours
Does it look like it has a colored led to indicate when the pack is full (usually red when charging, green when done) ?
If not, you will need to keep an eye on it
Cheers