Deben Lithium Question

[Mustelid 143]

Hi, can anyone please tell me how a lithium battery should be charged to extend it's life?

 

I've a 14ah deben lithium and I've never really given much thought to the charging. I know lithiums don't have a memory as such but should they be charged from empty on occasion? I just tend to bung mine on charge for s few hours before I go out!

[compoundarcher 35]

i thought because it has no memory you should charge it when ever you want....though i would run it right down now and then just to er on the side of caution...i have a 10ah deben one of the early ones with no fuel gauge still works fine...

[paulus 26]

i believe its best to store them fully charged if they're not going to used for a while and best stored at room temperature, the individual cells within the pack can if left uncharged over time fall below a certain power level and when you attempt to charge the pack it wont charge. this can be rectified by taking the individual cells out and giving them a quick boost charge with a normal lithium battery charger,

 

Li-ion batteries contain a protection circuit that shields the battery against abuse. This important safeguard has the disadvantage of turning the battery off if over-discharged, and storing a discharged battery for any length of time can do this. The self-discharge during storage gradually lowers the voltage of a battery that is already discharged; the protection circuit will eventually cut off between 2.20 and 2.90V/cell.

Some battery chargers and analyzers, including those made by Cadex, feature a wake-up feature or “boost” to reactivate and charge batteries that have fallen asleep. Without this feature, a charger would render these batteries as unserviceable and the packs would be discarded. The boost feature applies a small charge current to first activate the protection circuit and then commence with a normal charge.

Do not boot lithium-based batteries back to life that have dwelled below 1.5V/cell for a week or longer. Copper shunts may have formed inside the cells that can lead to a partial or total electrical short. When recharging, such a cell might become unstable, causing excessive heat or showing other anomalies. The “boost” function by Cadex halts the charge if the voltage does not rise normally.

Figure 1: Sleep mode of a lithium-ion battery

Some over-discharged batteries can be “boosted” to life again. Discard pack if the voltage does not rise to a normal level within a minute while on boost.

A study done by Cadex to examine failed batteries reveals that three out of ten batteries are removed from service due to over-discharge. Furthermore, 90 percent of returned batteries have no fault or can easily be serviced. Lack of test devices at the customer service level is in part to blame for the high exchange rate. Refurbishing batteries saves money and protects the environment.

[D Lloyd 2,790]

good read that mate

[stabba 10,745]

Store at room temperature. Always try and charge within 12 hours of being run down. If storing for lengthy periods it is recommended they be charged every 2 months. atb stabba

[N/east poacher 85]

Can you use a deben belt pack charger, to charge a lithium 14 ah ??