Actually, the number of recharge cycles (which is an educated guess, really) pertains to complete recharges, meaning that if you never let your battery drain beyond 50%, you should get roughly double the recharge number. "Roughly" implying here that there are so many other factors playing that you'd get laughed at if you complained about getting only 590 instead of 600 cycles. Also, tricle-charging is designed to have as little impact on the battery as possible.

LiIon's biggest enemy is the al-gorean climate of the car seat: Leaving your laptop in your car in the sun is enough to reduce its battery quality to an AA (provided the idjit who leaves a laptop on a car seat finds it even back upon returning, that is).