I want to find a very small, hopefully very inexpensive charging circuit for lithium ion batteries which has either such a low overhead that it will trickle charge well under 100mA, or else keep the circuit intact if the mA were below the threshold for the charge circuit to operate.
Basic low power (100mA max)intelligent charging with the ability to intermittently trickle charge even a few mA, that's what I'm looking for.
Initially this is for a 1 watt, 6 volt CIGS panel. The panel is only 1 oz, and the idea is to keep the weight, volume, and complexity down, and be able to pot the circuit for full waterproofing.
For a 4 oz., 5 watt version I'm hoping that the same can be done if the max charge were 1,000mA, while still allowing intermittent, very low mA charging.