Looking for an Lion-Charger for 17500 AW's???

[toby_pra]

Hi!

I am new and i need some help.

I bought some 17500 AW's protected to
use for my Surefire M3. At the moment i use
an Ultrafire 139 Charger, but many people told me,
that its an bad charger, because he dont stop charging,
what can the AW's make broken.

Could someone recommend this chrager or
an better charger?

Kind regards

Toby

 

[DM51]

If you have protected cells, this charger is OK. If you have UNprotected cells, you should be extremely careful with it, as it could overcharge them. For this reason, it is not recommended for use with unprotected cells.

The problem with the WF-139 is that after the light goes green, indicating that the charge is complete, it will continue to trickle-charge the cell if you leave it on there. There have also been reports that the WF-139 sometimes exceeds 4.2 volts before the light goes green.

With a protected cell, there is a safety device because the cell's protection circuit will prevent the cell overcharging to a dangerous voltage. Unprotected cells can just keep on charging, until the cell vents violently with flame (in other words, it blows up.) Such incidents are rare but when they occur they are dangerous, so you should always supervise Li-Ion cells while they are charging. Do not rely 100% on the protection circuit to prevent an incident.

4.20 volts is the maximum safe charge for a Li-Ion cell. 4.15 volts, or even 4.10 volts, will give your cells a greatly extended life-span. There is a recent report indicating that 4.10 volts is also a better limit for use in cold temperatures.

A better charger than the WF-139 is the Pila IBC charger, although it is twice as expensive as the WF-139.

 

[toby_pra]

Thanks for your quick help :thumbsup:

could you tell me, wich types of battery the
plia charger uses? (!7500, R123?)

Kind regards

toby

 

[DM51]

Thanks for your quick help :thumbsup:

could you tell me, wich types of battery the
plia charger uses? (!7500, R123?)

Kind regards

toby

You can use the Pila IBC to charge 17500s and R123s, up to 18650s. The bays are long enough for 65mm cells (xx650 size) and it ships with a spacer for 50mm long (xx500) cells, but you would need an additional spacer for R123s. You could use magnets, or metal bar stock cut to the correct length for that.

Its output is 600 mA per bay, so it is safe for cells with a capacity of more than 600 mAh. This means you should not use it for small cells such as 10440s or RCR2s.

 

[toby_pra]

Thank you very much :twothumbs