Elecraft KX2

3rd party batteries:

• https://www.akkuteile.de/keeppower-3s1p-18650-3500mah-10-8v-11-1v-li-ion-akkupack-mit-bms-schutz-mit-kabelanschluss_12102_3360?ReferrerID=9
• https://cellpacksolutions.co.uk/products/battery-packs/ansmann-standard-li-ion-3s1p-10-9v-3500mah-battery-pack/