Sony NP-FW50 Batteries: Charge 'em without AC Power - Alphatracks

I did have a backup camera which used the same Sony NP-FW50 battery. Could I use the backup camera as an improvised battery charger?

High Capacity of 1500mAh Can Meet your Daily Use and Travel Needs., Description, For Sony NP-FW50 Replacement Battery, Powerful Battery Capacity

Sony NP-FW50 Replacement Battery and Dual Battery Charger

K&F Concept 1100mAh NP-FW50 Battery with Type-C Fast Charging for Sony ZV-E10, Alpha 7, A7, A7II, A7RII, A7SII, A7S, A7S2, A7R, A7R2, A5000, A6400, A6500, A6300, A6000, NEX-3, NEX-5, 2 Pack

Compatible with these Sony models that use NP-FW50 batteries: Sony A6000 A6500 A6400 A6300 A7 A7II A7SII A7S A7S2 A7R A7R2 A7RII A55 A510 RX10 RX10II

Powerextra NP-FW50 Battery and 3 Channel Charger LCD Display Compatible with Sony ZV-E10 A6000 A6500 A6300 A7 A7II A7SII A7S A7S2 A7R A7R2 A7RII A55

Replacement Battery and Charger for Sony NP-FW50

Replacement Battery and Charger for Sony NP-FW50

Replacement Battery and Charger for Sony NP-FW50

【Powerful Battery Capacity】Two 7.4V Li-ion 1950mAh batteries, professional replacement of Sony NP-FW50 batteries. Designed specifically for your

LP-NP-FW50 Battery Pack and Portable Charger,LP 2-Pack Replacement Battery Compatible with Sony Alpha A6000, A6400, A6100, A6300, A6500, A5100, A7, A7

Sony NP-FW50 Batteries: Charge 'em without AC Power - Alphatracks

Replacement Battery and Charger for Sony NP-FW50