Internal battery not enough?

It’s a Milwaukee M18 5 amp hour battery. Fully charged 19 volts. These are the adapters I used.

https://www.amazon.com/gp/aw/d/B086VNPCWM?psc=1&ref=ppx_pop_mob_b_asin_title

https://www.amazon.com/gp/aw/d/B072BXB2Y8?psc=1&ref=ppx_pop_mob_b_asin_title

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