Which of these batteries? (please)

Equipment
5

Neither.

Buy a 3cell LiPo battery box from ebay

https://www.ebay.co.uk/itm/1-4-18650-Cell-Battery-Holder-1-10pcs-Case-Box-with-Leads-Pins-PCB-Board-Mount/152123513671

3 18650 cells

https://www.ebay.co.uk/itm/Samsung-18650-Li-Ion-3-7v-2600mAh-ICR-Rechargeable-Battery-with-Tags-Tabs-UK/182667177879

A balance cable

3 cell LiPo charger

https://www.ebay.co.uk/itm/Lipo-Battery-Charger-800mha-R-C-models/254517457695

Make your own pack up, buy additional 18650 if you want more endurance and swap cells in holder.

See here: Using 18650 LiIon cells

Simples!

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