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Title: Mobile charger with a punch Post by: pankaj on April 07, 2013, 12:59:21 PM Hi fellow RCIndians,
Damaged lipos have often some cells in working condition .Solder as many cells as you need /have to make a power back up for 5V DC devices (Mobile chargers, Modems, Leds ..etc) . Since all your individual cells won't have same voltage please do not directly short circuit cells in parallel while soldering. Use a resister or a filament bulb to short the cells and voltages should be Equal. Electronics Circuits and Switches are not modified and are used from a Single module . f4k3url/10GxR0s (http://f4k3url/10GxR0s) any generic/chinese power bank should do the job. Any power bank will do. Just remove the intenal battery (so it doesn't mattery which one u buy 1000mah or 5000mah ) and solder connections to lipo. config: Battery: 1S3P 2650*3 ~ 8000mAh 1 USB out (max 800mA) 1 Torch (4 leds) 1 UV currency detector Charging is done via the provided 2mm nokia pin with max 300ma(although lipo can handle more ,charging ckt will fry if current goes above 700ma) (http://www.thehobbyshop.in/images/IMG_20130405_184739.jpg) (http://www.thehobbyshop.in/images/IMG_20130405_184847.jpg) (http://www.thehobbyshop.in/images/IMG_20130405_185004.jpg) (http://www.thehobbyshop.in/images/IMG_20130405_184936.jpg) (http://www.thehobbyshop.in/images/IMG_20130405_185044.jpg) (http://www.thehobbyshop.in/images/IMG_20130405_185117.jpg) Title: Re: Mobile charger with a punch Post by: anikpro on April 07, 2013, 07:20:23 PM very good work man. Can u explain what type of resister you used?
Title: Re: Mobile charger with a punch Post by: pankaj on April 27, 2013, 03:34:49 PM I used a 1k resister 1/4W rating.any resister can be used as long as current flowing is less than the rated current.Then again batteries have only a little offset so current is not going to flow for long periods of time.
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