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?

SMALLRIG NP-FW50 1030mAh Camera Battery for Sony A7S II / A7R II/ZV-E10, USB-C Fast Charging Rechargeable Camera Battery for Sony A7, A7S, A7R, A6400, A6500, A6300, A5000, A5100, A6000, RX10-4330

Replacement Battery and Charger for Sony NP-FW50

NP-FW50 Battery For Sony Alpha ILCE-7 ILCE-7R ILCE-7K 7M2 ILCE-3000 ILCE-5000

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

Replacement Battery and Charger for Sony NP-FW50

Synergy Digital Camera Battery, Compatible with Sony NP-FW50 Digital Camera Battery - Ultra Hi-Capacity - (1500 mAh 7.2v) : Camcorder Batteries : Electronics

Sony Rechargeable Lithium-Ion Battery for NP-FW50 NPFW50 - Best Buy

Save Your Camera! Use a Wrist Strap - Alphatracks

USB-C Fast Charging: This NP-FW50 battery has a USB Type-C charging port that reduces charging time by 30% compared to other USB-C camera batteries,

SMALLRIG NP-FW50 1030mAh Camera Battery for Sony A7S II / A7R II/ZV-E10, USB-C Fast Charging Rechargeable Camera Battery for Sony A7, A7S, A7R, A6400

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

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

TWO IPAX Battery + Home&Wall Charger + Car Plug for Sony NP-FW50 Alpha

【Powerful Battery Capacity】7.4V, 1500mAh rechargeable Li-ion batteries use high quality cells for longer battery life with no memory effect. 【Comes

Pickle Power NP-FW50 Battery, 2 x 1500mAh Batteries for Sony Alpha A6500, A6400, A6300, A6000, A3000, A5000, A5100, A7II, A7RII, A7, RX10 NEX-3/5/7

DOTTMON NP-FW50 Dual Slot Battery Charger for Sony NP FW50 Batteries for Sony Alpha A6400, A6000, A6300, A6500, A5100, A7, A7II, A7RII, A7SII, A7S, A7S2, A7R, A7RII, A55, RX10 Camera Battery

SMALLRIG NP-FW50 1030mAh Camera Battery for Sony A7S II / A7R II/ZV-E10, USB-C Fast Charging Rechargeable Camera Battery for Sony A7, A7S, A7R, A6400, A6500, A6300, A5000, A5100, A6000, RX10-4330