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Fujitsu Laptop Battery Tips
What is a Deep Cycle Battery?
Deep cycle batteries are designed to be discharged down as much as 80% time after time, and have much thicker plates that a standard automotive battery.
What are the advantages of the AGM battery?
The advantages of AGM batteries are no maintenance, sealed against fumes, hydrogen, leakage, or non-spilling even if they are broken, and can survive most freezes. AGM batteries are "recombinant" which means the Oxygen and Hydrogen recombines inside the battery. These use gas phase transfer of oxygen to the negative plates to recombine them back into water while charging and prevent the loss of water through electrolysis. The recombining is typically 99+% efficient, so almost no water is lost. Charging voltages for most AGM batteries are the same as for a standard type battery so there is no need for special charging adjustments or problems with incompatible chargers or charger controls. Since the internal resistance is extremely low, there is almost no heating of the battery even under heavy charger and discharger currents. AGM batteries have a very low self-discharger rate (from 1% to 3% per month). So they can sit in storage for much longer periods without charging. The plates in AGM's are tightly packed and rigidly mounted, and will withstand shock and vibration better than any standard battery.
Is there a maximum temperature for charging lead acid batteries?
When charging lead acid batteries, the temperature should not exceed 120°F. At this point the battery should be taken off charger and allowed to cool before resuming the charger process.
What is a Lithium Ion (Li-ion) battery?
Li-ion has quickly become the emerging standard for portable power in consumer devices. Li-ion batteries produce the same energy as Ni-MH batteries but weigh approximately 35% less. This is crucial in applications such as camcorders or notebook computers where the battery makes up a significant portion of the device's weight. Another reason Li-ion batteries have become so popular is that they do not suffer from the memory effect AT ALL. They are also environmentally friendly because they don't contain toxic materials such as Cadmium or Mercury.
