The LiPo cell in these solar chargers is pretty much the same as any other 3.7V LiPo cell, and thus should be interchangeable with the stock camera battery, or a 3.7V RC battery. This would be true for any camera that uses 3.7V LiPo batteries (not just Canon ones), or indeed any other small device that runs on 3.7V, so long as it doesn't draw more current than the battery can safely produce.
Fully charged, the stock Canon battery will be 4.2V (actually more likely 4.1 V approx.) so the camera should be happy with that, in fact some cameras seem happy to run on +5V, but I think this may be pushing your luck slightly. The figure of 4.2V is a function of the LiPo chemistry, not anything unique to Canon. There is some variation between manufacturers as to the maximum charged voltage, but somewhere around 4.1 to 4.2 V is normal. Likewise the minimum allowable discharge voltage varies between manufacturers, but 3.0V is typical.
The DW01 Plus charge protection IC uses the following figures, so our battery will always be within these limits, or else the IC will disconnect it.
Overcharge Release Voltage min=4.05 V typical=4.10 V max=4.15 V
Overdischarge Release Voltage min=2.90 V typical=3.00 V max=3.10 VOutside of this voltage range
"here be dragons", moreover they are probably
fire breathing ones.
Note: I have used LiPo and LiIon interchangeably, in this thread though they are slightly different, the basic chemistry is very similar, and their operating characteristics are almost identical.
Basic LiIon cells are usually cylindrical (18650 and similar cells) and LiPo are usually "pouch shaped". "Square" mobile phone and camera styles "batteries" are usually LiPo. Technically these are typically actually single 3.7V cells, rather than batteries of cells.
RC batteries are also usually LiPo, and often multi-cell batteries, often in series and parallel combined pack arrangements to give greater capacity, higher voltage, and/or greater peak current. If the voltage is >3.7V you will need a regulator to avoid releasing the
magic smoke. If the battery is 3.7V then so long as you observe the correct polarity, the camera will only draw the current it needs.
If your camera runs on AA or AAA batteries, then it *may* be fine with 3.7V, as two fully charged Alkaline cells will typically give a maximum of 1.65V each (total 3.3V), with two fully charged zinc carbon producing perhaps a little more. Your camera may however object to 4.2V, so you try powering a AA or AAA cell camera this way at your own risk.
