Originally posted by: sharkeeper
To address the first poster, the battery (cell) in the MX1000 is not user replaceable.
Ok the ambient is kind of high. Around 80. It's even warmer outside. It should be cooler than that and I am going to get this fixed real soon.
I usually let it run until the red light comes on and the icon pops up telling me the battery is low. I've even ignored it a few times when the mouse was new and it ran all day before conking out. Now when the light comes on, better charge it up or it will conk in an hour! I use a MX510 as a backup mouse. I really don't have the space for all this cr- er stuff as it is so this is rather frustrating.
Honestly I think I will toss the MX1000 and replace it with a V500 as I hear it's the shoit especially for notebook users and people tight on space. The range is superb but it's not like I'm going to be using the mouse 40 feet from my notebook's 15.1" 1920x1200 display! :Q
im sorry, i have some bad news for you.
NEVER let Li-on run until it REQUIRES a full recharge! it actually degrades MUCH faster unlike Ni-cads and Ni-MHs. Top off regularly.
80 deg f will cause something like a 30-45%degrade over a year too.
FROM A TABLET PC MANUFACTURER
"How can I make my Lithium-Ion batteries last longer?
Lithium-Ion batteries are very different from Nickel-Cadmium (Ni-Cd) batteries and must be treated differently. Notebook batteries deliver an extremely high current (similar to a power hand tool) and so the batteries are stressed much more highly than a low-current battery (such as that used in a mobile phone).
Lithium-Ion batteries begin to degrade from the moment the battery cells are made by the battery cell manufacturer. This is due to a chemical reaction that gradually causes the internal impedance of the cells to increase and in time, and reduces the ability of the battery to deliver its charge. All chemical reactions are affected by heat. Each 10 degrees Centigrade rise in temperature will double the rate of this reaction. For this reason, it is very important to keep you battery as cool as possible at all times, especially when it is charging.
The other main factor that can drastically reduce your battery life, is if it is left in a fully discharged state for any length of time. If a Lithium-Ion battery becomes too 'flat' it will refuse to be charged up again (even though the battery cells are probably good). If this happens you will need a new battery. For this reason do not store the battery for more than a week or so in a fully discharged state.
Under ideal conditions, after just 1 year, a Lithium-Ion battery will probably hold about 80% of the original capacity of a new battery. Even if you keep your battery as cool as possible, it can only be expected to last for 2-3 years at the very most. If a battery is often kept warm/hot, it may only hold around 50%-60% of its original charge after 1 year.
"
FROM WIKIPEDIA
"Lithium ion batteries have a nominal voltage of 3.6V and a typical charging voltage of 4.2V. The charging procedure is "constant current/ constant voltage." This means charging with constant current until the 4.2V are reached by the cell and continuing with constant voltage until the current drops to zero. Lithium ion batteries cannot be fast-charged and need at least 4 hours to fully charge.
Li-ion batteries are not as durable as NiMH and NiCd designs, although they do not suffer from the memory effect. At a typical 100% charge level (notebook battery, full most of the time) at 25 degrees Celsius, Li-ion batteries irreversibly lose approximately 20% capacity per year from the time they are manufactured, even when unused. (6% at 0 degrees, 20% at 25 degrees, 35% at 40 degrees Celsius. When stored at 40% charge level, these figures are reduced to 2%, 4%, 15% at 0, 25 and 40 degrees Celsius respectively.) Every (deep) discharge cycle decreases their capacity. The degradation is sloped such that 100 cycles leave the battery with about 75% to 85% of the original. When used in notebook computers or cellular phones, this rate of deterioration means that after three to five years the battery will have capacities too low to be still usable."
