does Lithium-Ion battery have a memory ????

[pinkabou]

subject say all

Do I discharged the battery completely before doing a charge, or I can use my pda, and when I do nothing, put the pda on the cradle and let them charge....

memory effect ????


tx in advance

[Willber-Force]

No Memory effect. that's what's good about Li-Ion batterids... Them memory effect is only with Ni-Cad. Just charg as much as you want when you want.

[Willber-Force]

Gee... I spell well... :rolleyes:

:)

[pinkabou]

tx for the info !!

[NJL!2016]

why do they put memory in batteries? its not doing me any good.

[Willber-Force]

He was taking about the so called "memory effect" in which Ni-Cad's need to be discharged fully before charging or else they will not not get a full charge when charged.

No rom in my batteries :(

;)

[kstuart]

According to Peter Strobel: I already gave a detailed description of the advantages of the new Lithium Ion Polymer battery in the m505 review. The m500 uses the same energy source.
Only because I keep reading alot of nonsense about it, here's a brief introduction to LiIon batteries: Lithium Ion (Polymer or not) batteries don't have any memory effect. Recharging them anytime doesn't harm. In fact, its even better than running them down all the way. A special little circuit that's added already by the battery manufacturer and mostly contained directly in the battery assembly, takes special care that the battery voltage doesn't fall short of a certain minimum value. If that's in store, the circuit virtually breaks the connection (electronically) with the battery totally. Not even the current for data retension is supplied then. This break can only be resetted by a current in the opposite direction, in other words if the battery is charged. No panic, the PalmOS takes enough care of the situation. A LiIon powered Palm can't be switched on long before that absolute minimum battery voltage level is reached. But nevertheless, you shouldn't forget an already empty Palm with LiIon battery in any corner for a longer time. Not only that you'll loose all your data, but after a long enough time the battery voltage will still drop below that minimum level due to self-discharge. And that damages a LiIon battery much more than other battery technologies. A LiIon cell that drops only once below its minimum voltage can loose 50% of its capacity right away and the damage is permanent. On the other hand, LiIon batteries can be maintained quite easily. LiIon batteries are not charged with a constant current like NiMHs or NiCads, neither do they need a nifty management to detect a battery-full situation to protect them from overcharge. LiIon cells are charged with a manufacturer specified constant voltage and when a they become full, they automatically don't draw any more current because the cell voltage reaches the charge voltage. In practice the situation is a bit more complicated. If a LiIon cell is empty enough, it would consume too much current in the beginning of the charge process. The charger has to limit the current to a cell specific maximum then. So in fact, a LiIon charge cycle is a mix of constant current first, constant voltage later. Another difficulty is the accuracy. The accuracy of the charge voltage has to be better than 1%. But the important feature is the nearly no current flow situation when the battery is full. That means basically, that you can leave an m500 in the cradle forever without damaging the battery. It means also, that the earlier you recharge the battery, the less current is flowing into the battery and the lesser wear you have in the cell. Of course you would charge the battery more often then, which balances out. But the bottom line is, that the lifetime of a LiIon cell is not that much dependent on the number of charge cycles, but on the total energy flowing in and out of the cell. If a LiIon battery is specified with a lifetime of 500 cycles, that means full cycles. If you always discharge the battery only half and recharge it then, you'll get 1000 of these cycles ... roughly at least. So, recharge your m500 or m505 whenever you have a chance to do so, it doesn't hurt. And after all, a full battery also gives a good feeling, doesn' it :)? Oh, a last word: LiIon batteries don't like heat nor cold. So never leave your Palm on the dashboard of your car or in other places where the temperature exceeds 60 degrees celcius or falls below -10 degrees celcius. That's the official operating temperature range of the LiIon Polymer battery used in the m500 series.

[charliedoble]

Wow, now that is a great piece of info that cracks a couple of myths that go around.

Nice...