The suggestion about removing the battery is because of 'battery memory' I'd imagine.

No. Lithium-ion batteries don't suffer a "memory effect". In fact they thrive on frequent recharges.

The recommendation to remove the battery is, as Bill said, to avoid overheating it which drastically reduces its lifespan. Also avoid full discharges which can kill a Li-ion battery.

I said that.

In reply to a post by AEP:

Also avoid full discharges which can kill a Li-ion battery.

Wrong.

In reference to batteryuniversity.com/learn/article/how_to_prolong_lithium_based_ba...:

A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges.

Although lithium-ion is memory-free in terms of performance deterioration, batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem. Letting the battery run down to the cut-off point in the equipment will do this. If ignored, the fuel gauge will become increasingly less accurate. (Read more in 'Choosing the right battery for portable computing', Part Two.)

In reply to a post by billford:

In reply to a post by OCdragon:

They seemed to suggest that I should remove the battery from my laptop whenever I am using the AC Adapter only may be a good idea to conserve battery life,

That's a common recommendation if the laptop is normally used on mains power.

I always do for my own it also has added advantage of reducing weight - if the battery gets put in more than 3 or 4 times a year I'd be surprised

In reply to a post by billford:

Some people suggest they are best stored in the fridge when not in use, but I'm not sure about going that far!

If it had been in fridge - I'd have least known where to look when going away (couldn't find it when needed Friday ) - Though I am not sure it sounds a good idea as liable to attract moisture when put in/brought out of fridge

Frequent full discharges should be avoided when possible.

The suggestion about removing the battery is because of 'battery memory' I'd imagine.

The recommendation is to keep unused Li-ion batteries in the fridge, but make sure they are enclosed in a waterproof package - sealed plastic bag, something like that.

In reply to a post by AEP:

Frequent full discharges should be avoided when possible.

Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem

I'm not going to argue. As long as people don't get incorrect advice I don't mind.

Post deleted by Sadoldman