Show CartWhile older cell phones were powered with nickel-based batteries, most newer phones are now equipped with lithium-ion. This chemistry is preferable, as it is lightweight, offers high energy density and lasts long enough to span the typical life of the product. Plus, lithium-ion contains no toxic metals.
To obtain thin geometry, some cell phone manufacturers have switched to lithium-ion-polymer. This satisfied consumer requests for slim battery designs. In the meantime, technological advancements also made low profile lithium-ion possible. Thus, lithium-ion packs are now available in 3 mm, a profile that suits most battery designs. Lithium-ion has the advantage of lower manufacturing cost and better performance, plus it has a longer cycle life than the polymer version.
Lithium-ion is a low maintenance battery. No periodic discharge is needed and charging can be done at random. A random charge means that the battery does not need to be fully depleted before recharge. In fact, it is better to recharge the battery before the battery gets too low. Full discharges put an unnecessary strain on the battery. A recharge on a partially charged battery does not cause memory because there is none.
Charging lithium-ion is simpler and cleaner than nickel-based batteries but the chargers require tighter tolerances. Lithium-ion cannot absorb overcharge and no trickle charge is applied on full charge. This allows lithium-ion to be kept in the chargers until used. Some chargers apply a topping charge every week or so to replenish the capacity lost through self-discharge while the battery sits idle in the charger. Repeated insertion of the battery into the charger or cradle does not damage the battery though overcharge. If the battery is full, no charge is applied. The battery voltage determines the need to charge.
On the negative side, lithium-ion loses charge acceptance as part of aging, even if not used. And lithium-ion batteries should not be stored for long periods. Rather, lithium-ion batteries need to be rotated like perishable food. The buyer should be aware of the manufacturing date when purchasing a replacement battery. Aging affects battery chemistries at different degrees.
So… just like when purchasing food, check the dates, and once in the refrigerator… ROTATE!
For additional information, visit www.batterygiant.com