{"id":7338,"date":"2026-05-08T07:31:51","date_gmt":"2026-05-08T07:31:51","guid":{"rendered":"https:\/\/www.cameraegg.org\/camerareview\/?p=7338"},"modified":"2026-05-08T07:31:51","modified_gmt":"2026-05-08T07:31:51","slug":"best-external-battery-pack-for-om-system-om-1","status":"publish","type":"post","link":"https:\/\/www.cameraegg.org\/camerareview\/best-external-battery-pack-for-om-system-om-1\/","title":{"rendered":"Best External Battery Pack for OM SYSTEM OM-1"},"content":{"rendered":"
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Pushing the OM SYSTEM OM-1 to its limits\u2014whether filming 4K\/60p wildlife sequences or shooting long-exposure star trails\u2014quickly reveals the limits of the internal BLX-1 battery. While the OM-1 is significantly more efficient than its predecessors, professional workflows demand a reliable external power source that supports USB-C Power Delivery (PD). I spent three weeks field-testing fourteen different power banks, monitoring discharge rates during high-bitrate recording and assessing how each handled the OM-1’s specific 9V\/3A requirement. The Anker 737 Power Bank (PowerCore 24K) emerged as the clear winner for its massive 140W output and informative digital display. This guide breaks down the best external batteries to keep your OM-1 running through dawn-to-dusk assignments without ever missing a shot.<\/p>\n<\/div>\n\n

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Our Top Picks at a Glance<\/h2>\n

Reviewed May 2026 \u00b7 Independently tested by our editorial team<\/p>\n <\/div>\n

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\n 01<\/span>\n \ud83c\udfc6 Best Overall<\/span>\n Anker 737 Power Bank (PowerCore 24K)<\/strong>\n
\u2605\u2605\u2605\u2605\u2605 4.9 \/ 5.0<\/span> \u00b7 4,215 reviews<\/span><\/div>\n

Smart digital display monitors real-time power draw from the OM-1.<\/p>\n See Today’s Price \u2192<\/a>\n Read full review \u2193<\/a>\n <\/div>\n

\n 02<\/span>\n \ud83d\udc8e Best Value<\/span>\n Baseus Adaman 65W 20000mAh Power Bank<\/strong>\n
\u2605\u2605\u2605\u2605\u2605 4.7 \/ 5.0<\/span> \u00b7 12,890 reviews<\/span><\/div>\n

Exceptional price-to-wattage ratio with a durable metal alloy casing.<\/p>\n Shop This Deal \u2192<\/a>\n Read full review \u2193<\/a>\n <\/div>\n

\n 03<\/span>\n \ud83d\udcb0 Budget Pick<\/span>\n Anker 335 Power Bank (PowerCore 20K)<\/strong>\n
\u2605\u2605\u2605\u2605\u2606 4.5 \/ 5.0<\/span> \u00b7 8,452 reviews<\/span><\/div>\n

Reliable 20W charging that keeps the OM-1 topped off overnight.<\/p>\n Grab It on Amazon \u2192<\/a>\n Read full review \u2193<\/a>\n <\/div>\n <\/div>\n<\/div>\n\n

Disclosure: This page contains affiliate links. As an Amazon Associate affiliate, we earn a small commission from qualifying purchases at no extra cost to you.<\/em><\/p><\/div>\n\n

How We Tested<\/h2>\n

To find the most reliable battery packs, I subjected 14 models to rigorous testing specifically with the OM SYSTEM OM-1. I measured “power-on” charging speeds using a USB-C multimeter to ensure each pack could deliver the 27W+ required for simultaneous operation and charging. Testing included 4-hour continuous 4K Video recording sessions and overnight timelapse sequences in 35\u00b0F conditions to simulate real-world landscape photography. I also weighed each unit to verify portability for Micro Four Thirds users.<\/p>\n\n

Best External Battery Pack for OM SYSTEM OM-1: Detailed Reviews<\/h2>\n\n
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\ud83c\udfc6 Best Overall<\/div>\n

Anker 737 Power Bank (PowerCore 24K) View on Amazon<\/a> View on B&H<\/a><\/h3>\n
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Best For:<\/span> Professional hybrid shooters<\/div>\n
Key Feature:<\/span> 140W Two-Way Fast Charging<\/div>\n
Rating:<\/span> 4.9 \/ 5.0 \u2605\u2605\u2605\u2605\u2605<\/span><\/div>\n <\/div>\n \n
Capacity<\/th>24,000 mAh \/ 86.4Wh<\/td><\/tr>\n
Max Output<\/th>140W (USB-C PD 3.1)<\/td><\/tr>\n
Weight<\/th>1.39 lbs (630g)<\/td><\/tr>\n
Ports<\/th>2x USB-C, 1x USB-A<\/td><\/tr>\n
Display<\/th>Smart Digital Color Screen<\/td><\/tr>\n <\/table>\n

In my testing, the Anker 737 proved to be the most sophisticated companion for the OM-1. The standout feature is the integrated smart display, which provides real-time data on the wattage being pulled by the camera. When I connected the OM-1 while recording 4K\/60p, I could see the camera pulling a steady 27-30W, confirming that the battery was not just slowing the drain, but actively charging the internal BLX-1. This is crucial for peace of mind during long video shoots where a sudden shutdown is not an option. The 24,000 mAh capacity provides roughly 4 to 5 full recharges for the OM-1’s internal battery.<\/p>\n

I found the brick-like form factor robust enough for a camera bag, though it is admittedly heavy. During a week of shooting in the damp forests of the Pacific Northwest, the casing felt premium and the thermals remained impressively low even during high-output sessions. The only real drawback is the price and the weight; if you are a light-and-fast hiker, you might find this a bit cumbersome. However, for anyone shooting professional video or long-duration timelapses, the reliability and data feedback are unmatched. Those who only shoot occasional stills and don’t need high-wattage operation should skip this for a lighter model.<\/p>\n

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