Hi Aragorn
This is the Rutlands write up of the Panasonic: -
"If we had to recommend a cordless drill driver , it would have to be the New Panasonic EY6431.This compact 15.6 volt drill driver with it's new ergonomic design is outstanding, and will drive over 550 x 21/2" long No 12 woodscrews on one battery charge. It now comes with two 3.5 amp hour nickel metal hydride batteries.The amp hours relate to the actual running time of the drill & 3.5 amp hours is exceptional, giving 75% more running time than the normal 2 amp hour batteries.You can ,unlike with NiCad batteries, recharge the battery even when it is not fully discharged, without risk of ruining the battery's memory.Panasonic's intelligent charges are specifically designed to maximize the life of the batteries.If the battery is too warm when you try and recharge , the charger waits until it has cooled down before charging.When fully charged the unit automatically switches off to avoid heat build up.You also have a fast 55 minute re charge period.Being one of the most compact drills at only 208mm in length & weighing only 2.2kg you can comfortable work overhead & in confined locations.The torque capacity of 44.1Nm has been tested to be stronger than 18v drills from other leading brands.The planetary gearing ensures smooth rotation & a prolonged working life.Fitted with an 18 stage clutch plus drill position, variable speed trigger control , two speed ranges and a 13mm one handed quick release chuck this is without doubt one of our finest examples of a premium quality power tool.Our choice in cordless drills.
Supplied with an intelligent charge,13mm keyless chuck,2 x 15.6V 3.5amp hour NiMh batteries,carry case"
Cheers
Neil