If you are in the market for a Dell Studio 1735 battery, USB Phone World is your best source for these replacement batteries. Our batteries are directly compatible to the original batteries found on these systems and have been manufactured using the latest lithium ion technology. Dell Studio 1735 battery mAh for the six-cell units is 4800. By contrast, the nine-cell Dell 1735 extended battery has a content capacity of 7200mAh. These Studio 1735 batteries hold their charge very well when not plugged into a power source, making them an ideal choice for a secondary laptop battery. If you are new to owning a Studio 1735 and have asked, On a Dell Studio 1735, what is the life of the battery, the answer is two-fold. In review of this laptop from 2008, testers rated battery time as roughly two hours 20 minutes. As for total discharge time before the battery needs to be replaced, Dell rated these batteries at 300 discharge/charge cycles. Since the laptops hit the market in 2008, the time is probably right to replace these original batteries with new, compatible batteries from USB Phone World. Since our prices are much lower than retail, the purchase of more than one replacement battery would be a sound investment.