This is what I found on Lithium Ion batteries, just to back my ramblings up. The source is
http://www.cellpower.com/battery_tips.cfm (this effectively contradicts what Mr. Isaac was saying):
“Lithium-ion Batteries
Lithium-ion batteries are the newest technology batteries and offer several advantages over NiMH and NiCd batteries. Lithium-ion batteries are preferred for their lighter weight and higher performance. Lithium-ion batteries are typically 20-35% lighter and will provide 10-20% better performance than a NiMH battery of equivalent mAh rating. Lithium-ion batteries are also unique in that they are not susceptible to the "memory effect".
A new Lithium-ion battery will benefit from an initial "conditioning" of the battery. For the first 3 charge cycles, fully charge the battery overnight and allow it to fully discharge before recharging. Once conditioned, Lithium-ion batteries will perform best when charged at a rate somewhere between a conventional slow charge and a rapid charge. When rapid charging, Lithium-ion batteries require a charger designed to charge Lithium batteries. To achieve a true full charge when rapid charging, the battery needs to be slow charged the last 10-15% of its charge cycle. Most "intelligent" desktop and Lithium-battery rapid chargers provide this capability. A Lithium-ion battery may be damaged by extensive overcharging (continuously on a charger for more than 24 hours).”
I am sorry I haven’t shortened it, but I felt the whole piece of text certainly enhances understanding of the subject.
Also I found this “do’s and don’ts list (which is useful:
“Battery Do's & Don'ts (to maximize performance)
Do's:
Properly "condition" (fully charge/discharge for first 3 cycles) the battery when it is new.
Keep the battery and the contact terminals clean.
Avoid exposing the battery to extreme heat and cold.
Use the battery. If possible, avoid letting your battery sit dormant for long periods of time.
Use only the phone options and accessories that you really need.
Charge and re-condition a battery after an extended idle period.
Don'ts:
Toss, drop, or otherwise abuse the battery.
Short-circuit the battery.
Open and expose the cell contents.
Modify the battery casing and/or housing.
Allow the battery to be exposed to rain or excessive moisture.
Incinerate a battery. Properly dispose of a used battery.”
I think my device may be faulty. Twice now when I have switched it on as normal, it has gone into set up mode and it is like the first time I got it. It's like I've done a hard reset but I know I haven't.
I am now seeing about sending it back and getting a refund.
Laura