ZL1NC’s Information Pages

a collection of useable information

But first some blurb!

The specific energy of a Lithium-ion battery is twice that of NiCd, and the high nominal cell voltage of 3.60V as compared to 1.20V for nickel systems contributes to this gain.

As at January 2013 typical gel-cell (SLA) 12V battery energy storage cost is about 38c per Wh (watt-hour) - NZ & USA prices are within 2% - compared to $3.73 per Wh for lithium ion batteries. In terms of weight SLA batteries deliver 36 Wh per kg (2.2 pounds) and Li-ion batteries deliver 118 Wh per kg (2.2 pounds).

The lithium-ion battery works on ion movement between the positive and negative electrodes. In theory such a mechanism should work forever, but cycling, elevated temperature and aging decrease the performance over time. AND studies have revealed that the lithium ions responsible to shuttle electric charge between the electrodes begin to migrate from the cathode and permanently settle on the anode. This results in the cathode having a lower lithium concentration than a new cell, a phenomenon that is irreversible, so the battery is now incapable of holding as much "charge" and is now becoming toast.

Reduce this risk by following the steps below !

  • 1: Keep your batteries at room temperature
  • 2: Think about getting a high-capacity lithium-ion battery, rather than carrying a spare
  • 3: Allow partial discharges and avoid full ones (usually)
  • 4: Avoid completely discharging lithium-ion batteries
  • 5: For extended storage, discharge a lithium-ion battery to about 40 percent and store it in a cool place
  • 6: Don't charge lithium-ion batteries when they have just been in use