>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 01 August 2005 15:34
>To: PIC List
>Subject: [EE] Design Challenge - Simple SLA battery charger.
>
>
>Here we go again ...
>
>LiIon tends to be dear and potentially tricky to charge (although 
>simple scheme that don't develop full capacity may be OK). 
>LiIon would be acceptable performance wise if cost was acceptable wrt 
>Lead Acid.

Russell,

This is how simple a Li-Ion/polymer charger can be, as long as you include under-voltage protection in your design to ensure the cell voltage dosen't drop below ~2.9 volts.

http://www.shdesigns.org/lionchg.html

Regards

Mike

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