Hi John, Yes, two or three times actually.
to know the current the charger
is rated for.
Should be on a label or embossed on the case somewhere.
Given that the calculation is easy.
V=I*R --> R=V/I
Given an initial charging voltage
of approx 7.4 +10% = 8.14V and a charge current of 0.5A; V=15-8.14 --> 6.86
R=6.86/0.5 --> 13.72Ω so you need a 12 or 15Ω resistor.
P=I*V = 0.5*6.86 --> 3.43W.
So you need at least a 5W resistor.
A ceramic resistor if there is enough space.
Alles klar Herr Kommissar? 😉
Cheers, Doug 😎