Mobile LiIon battery charger(?)
Mobile LiIon battery charger(?)
(OP)
so, is it possible to make a mobile charger from some LiIon battery with greater cap, like ~3000mAh (could be lap-top battery or standard e.g. 18650), to charge smaller LiIon 3,7V cylindric batteries, like ~500mAh?
plz answer, because this will mean a lot to many ppl.
plz answer, because this will mean a lot to many ppl.





RE: Mobile LiIon battery charger(?)
Keith Cress
kcress - http://www.flaminsystems.com
RE: Mobile LiIon battery charger(?)
RE: Mobile LiIon battery charger(?)
Also, please refrain from using textspeak. While there is generally low risk of confusion, the engineering universe is already sufficiently inundated with acronyms and abbreviations.
TTFN

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RE: Mobile LiIon battery charger(?)
Keith Cress
kcress - http://www.flaminsystems.com
RE: Mobile LiIon battery charger(?)
yes i knew that i would need some electronics to make that charging possible. the battery that would be charged is already PCB protected, and it should be this one: http://www.soshine.com.cn/html/Products557.htm
i was thinking to use this one as the charging battery: http://ww
as you can see, the bigger one has 7.4V - is it enough for charging the smaller one? if not, should i make parallel set up to increase the Voltage? (but, cap. will be 50%-, right?)
RE: Mobile LiIon battery charger(?)
and, sorry for my "faulty" English - it's not my first language.
RE: Mobile LiIon battery charger(?)
TTFN

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RE: Mobile LiIon battery charger(?)
could this be helpful for battery to battery charging: http:
RE: Mobile LiIon battery charger(?)
The fact that you didn't recognize that the circuit is intended for lead-acid batteries is problematic. The fact that you didn't read the caveat in the linked commentary is problematic. Li-ion batteries are completely dissimilar to lead-acid batteries. The latter are tolerant of abuse, poor charging, and overcharging. Li-ion batteries tolerate none of that.
TTFN

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RE: Mobile LiIon battery charger(?)
Keith Cress
kcress - http://www.flaminsystems.com
RE: Mobile LiIon battery charger(?)
thanks guys.