Will this work as a "dummy battery" with a reserve charge? I.e. passthrough keeps it topped off at 100%?

Dear Friend, Thanks for inquiry, Sorry, it cannot work as a dummy battery. If you need a dummy battery, we recommend you to see SmallRig dummy battery Asin:B0C85QN1SD, B0C85VJ1BVSincerely, SmallRig Customer Service

Can you charge the battery while its in the camera being used?

Dear Friend, Thanks for inquiry. We don't recommend using it this way. Sincerely, SmallRig Customer Service

do these charge other things via usb? like a powerbank as well?

No, the USB-C port does not output power. In response to your question, I attempted to charge several devices from the USB-C port on the camera battery. I tried this with a USB-C to Lightning cable and a USB-C to USB-C cable. None of those devices began to charge. I verified that these devices all accepted a charge when plugged into power sources with these same cables. The SmallRig battery that I used for this showed a 99% state of charge.

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NP-FZ100 Battery

Product ID: 537830151

Details

Battery capacity
2400
Battery cell composition
Lithium Ion
Brand
SMALLRIG
Number of batteries
1 A batteries
Recommended uses for product
Camera

⚡USB-C fast charge 40% quicker

🔋2400mAh high capacity power

🔌Universal USB-C & multi-source charging

$87.88

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Description

🔋 Power up fast, shoot longer, stress less!

CHARGE IN A FLASH - Cut your downtime with 2.5-hour USB-C fast charging—40% faster than competitors.
BUILT TO LAST SAFE - Durable fire-resistant casing with stable voltage circuitry ensures reliability on every shoot.
PLUG PLAY ANYWHERE - Charge from power banks, car chargers, or wall outlets with versatile USB-C compatibility.
POWER THROUGH YOUR SHOOT - Robust 2400mAh capacity keeps your Sony A7 series running longer for uninterrupted creativity.
ZERO COMPATIBILITY DRAMA - Fully decoded battery means no annoying Sony warning pop-ups—just seamless performance.

The SMALLRIG NP-FZ100 is a premium 2400mAh lithium-ion camera battery designed for Sony Alpha series cameras. Featuring integrated USB-C fast charging, it reduces charge time by up to 40% compared to other USB-C batteries and 65% versus conventional charging. Compatible with multiple Sony models, it offers reliable, warning-free operation with a durable, fire-resistant casing and versatile charging options from power banks to car chargers—perfect for professionals who demand efficiency and dependability on the go.

Specifications

ASIN	B0C77WS89N
Amperage	6.7 Amps
Antenna Location	Camera
Battery Capacity	2400 milliampere_hour
Battery Cell Type	Lithium Ion
Battery Weight	102 Grams
Best Sellers Rank	87 in Camera Batteries
Brand Name	SMALLRIG
Compatible Phone Models	A7R III, A7S III Camera
Country of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (817)
Item Dimensions	5.2 x 3.9 x 2.3 centimetres
Item Weight	102 Grams
Manufacturer	SMALLRIG
Model Number	NP-FZ100B
Number of Batteries	1 A batteries required. (included)
Product Warranty	1 year manufacturer
Reusability	Rechargeable
Unit Count	1 count
Voltage	7.2 Volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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$87.88

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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