Amps pulled by Dewalt Sawzall

Been building out an external power pack for my Dewalt tools. A 5S8P (5 series by 9 parallel) Lithium Co pack of old laptop 4.2v 2.2ah batteries.  Version 1.0 got the 18ga wire warm, which surprised me. So I upgraded to 16ga wire and added another 2P to make the 2.0 version of the current 5S8P that should put out at 1C about 16amps (2.2ah x 8amps – degradation).  And about 30amps if pushed to 2C.   I sense no warm up now.

But I wanted to know how many amps the Sawzall, so I hooked up a analogue amp meter and saw it pulls 9.5 amps steady state, no load. On the ramp up to steady state it jumped to 15amps+ for a moment but my amp meter only went to 15.external pack external pack2

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