Here is a brief introduction of HP Compaq 6710B  battery from laptopbatteryretail.co.uk, a very good store of cheap high quality laptop parts:

Model No.: Hp Compaq business notebook 6710b

Chemistry: Li-ion

Volts : 10.8V

Capacity : 4400mAh/6600mAh

Battery Cells: Grade A li-ion cell, Long life cycle

Size (L x W x H): 203.60*70*20.40mm

Shipping Weight (in pounds): 446g

Color: Black

Condition: Just fresh out from factory, still in box

Below are some guidelines to prolong battery’s longevity.

• Avoid frequent complete discharges, since this puts added strain on a pc battery. Several partial discharges with frequent recharges are preferable for lithium-ion batteries than a full discharge. Recharging partially charged lithium-ion batteries is secure, since they have no memory. Short laptop battery’s life in a laptop commonly depends on the high temperatures rather than charge – discharge patterns.

• It is advisable to fully discharge a laptop battery after 30 charges. Otherwise, the fuel gauge will get significantly less accurate and in some cases will cut off the device prematurely.

• Keep a lithium-ion hp compaq 6710b laptop battery cool.

• Remove a pc battery from a laptop when it is run on a fixed power. (Some laptop producers express concern for dust and moisture that gather inside the pc battery casing.)

• Avoid purchasing spare LiON batteries for later deployment. Pay special attention to manufacturing dates. Do not buy old stock, even if it is available at lower prices.

• If you have got a spare LiON 6710b  laptop battery, use one to the full and keep the other one cool by putting it into the fridge. Do not freeze the laptop battery. For optimal results, store the battery at 40% state-of-charge.

Before using any laptop, read a manual instruction supplied.

Source: http://www.laptopbatteryretail.co.uk/hp-compaq-business-notebook-6710b-battery.html