Slow Charging Battery : Thinkpad X60

I picked up an old thinkpad x60 from ebay a couple of weeks back and it has been serving me well as backup computer. So I ordered a 9 cell battery for it from amazon. It says its authentic lenovo but I have no means to verify that. It gives me good back up and all but it charges very slowly.

Right now, I am not sure If I got a bad apple or if there is some tweaking that I am not aware of( this is my first thinkpad). Btw, I have attached the information of the battery using upower.

Thanks!

crunchbang@crunchbang:~$ upower -i /org/freedesktop/UPower/devices/battery_BAT0
native-path:          /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:00/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
vendor:               SANYO
model:                42T4632
serial:               8883
power supply:         yes
updated:              Wed Dec 10 18:05:19 2014 (0 seconds ago)
has history:          yes
has statistics:       yes
battery
present:             yes
rechargeable:        yes
state:               charging
energy:              8.35 Wh
energy-empty:        0 Wh
energy-full:         74.88 Wh
energy-full-design:  74.88 Wh
energy-rate:         11.059 W
voltage:             14.958 V
time to full:        6.0 hours
percentage:          11.1512%
capacity:            100%
technology:          lithium-ion