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you guess when my output current is 0.1A my voltage is be lower than 13v?Current regulators require something to sense the current. Most methods of doing this will incur some voltage drop, even if it is only 0.1V.
Take a look in the LED resource. There is a simple constant current source that can drop less than 1V. For lower drops you need more exotic circuits.
l have to use this circuit for very slow charging solid batteryBy 'current regulator' do you mean a controllable constant-current source or a current-limiter?
it's sample of my battery :What battery chemistry? Lithium batteries are very fussy about their charging regime. A dedicated battery charge control IC might be better/safer than just a constant-current source.
The link doesn't work.
This circuit should be OK?I've used a standard plug pack (transformer type, not switchmode) 12v 500ma supply via an adjustable LM317 current regulator for different applications for years.
The supply outputs more than 12v with varying loads naturally, but just trying it now on a fully charged (via another auto charger yesterday)12v sealed lead acid 7Ah battery, it will still deliver 40mA at maximum adjustment on the pot.
So I think your 1.3Ah battery should be ok with something along these lines.