Sourced metric · 13 models

Power banks by rated energy per gram

Compare explicit manufacturer watt-hour ratings against carrying weight. This calculated ranking excludes packs without a sourced Wh rating.

Published formula

How we order this list

We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. Unknown readings stay out of the list. Ties prefer lower weight, then the permanent model slug.

The result is a calculated comparison of rated battery energy and manufacturer-listed pack weight. It is not delivered USB energy, runtime or a measured efficiency test.

1
NITECORE · outdoor
NITECORE NB10000 Gen4
A low-weight, phone-first outdoor bank when a 22.5W single output is enough. It is not a high-watt laptop option, and its dual-output total is lower than its per-port peak.
Rated energy density
272.7 Wh/kgest.. Show source
estimated sourcenitecore.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. · Both the manual and product page state 39Wh. · 143g ±5g, with the lanyard charging cable/accessory excluded.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
2
Nitecore · outdoor
Nitecore NB Plus 10,000mAh Power Bank
A slim, 10,000mAh-class outdoor option for buyers who value a 155g listed weight and water-resistance rating over a higher USB-C output ceiling.
Rated energy density
248.4 Wh/kgest.. Show source
estimated sourcenitecore.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. · 155g ±5g; accessories not included.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
3
Nitecore · outdoor
Nitecore NB20000 Gen 3 20,000mAh Power Bank
A 20,000mAh outdoor option for carrying more stated energy than a 10,000mAh bank while keeping the listed body weight at 291g.
Rated energy density
247.4 Wh/kgest.. Show source
estimated sourcenitecore.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. · 291g ±5g; accessories not included.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
4
Nitecore · compact
Nitecore Carbon Battery 6K 6,000mAh Power Bank
A very light compact bank for buyers who prioritize a small 88g carry and accept a 10W USB-C ceiling in both directions.
Rated energy density
245.5 Wh/kgest.. Show source
estimated sourcenitecore.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. · 88g ±3g.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
5
Nitecore · outdoor
Nitecore CARBO 10000 Gen2 10,000mAh Power Bank
A light 10,000mAh-class outdoor choice when a 30W USB-C single-port ceiling matters more than multi-device output.
Rated energy density
228.2 Wh/kgest.. Show source
estimated sourcenitecore.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. · 170g ±5g.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
6
UGREEN · laptop
UGREEN 145W 25,000mAh 3-Port Power Bank
A higher-capacity laptop option when the laptop can use USB-C1’s 140W ceiling. It is also 513g, and its documented input is 65W, so weigh the extra output and capacity against carry weight and recharge setup.
Rated energy density
175.4 Wh/kgest.. Show source
estimated sourceus.ugreen.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
7
Anker · laptop
Anker Prime Power Bank (26K, 300W)
Choose it when a compatible laptop and other connected devices can use the extra shared output. One USB-C port tops out at 140W; the 300W figure is the combined ceiling across ports.
Rated energy density
166.3 Wh/kgest.. Show source
estimated sourceservice.anker.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
8
EcoFlow · laptop
EcoFlow RAPID 25,000mAh 170W Power Bank
A practical shortlist candidate when 140W USB-C output is enough and you prefer two high-rated USB-C ports in one pack. Confirm laptop input limits; the device will negotiate according to the profiles it supports.
Rated energy density
159.3 Wh/kgest.. Show source
estimated sourceus.ecoflow.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight.
Weight source · checked 2026-10-07
Review details →
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Availability checked 2026-10-07. Stock can change.
9
EcoFlow · compact
EcoFlow RAPID Mag 5,000mAh 7.5W Magnetic Power Bank
A compact match when the priority is a thin magnetic attachment and the phone’s charging setup supports the intended alignment. For faster wired top-ups, EcoFlow lists USB-C at up to 20W; for broader Qi2 performance, compare products explicitly rated and certified at that tier.
Rated energy density
157.3 Wh/kgest.. Show source
estimated sourceus.ecoflow.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight.
Weight source · checked 2026-10-07
Review details →
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Availability checked 2026-10-07. Stock can change.
10
Anker · compact
Anker Nano Power Bank (10K, 45W, Built-In Retractable USB-C Cable)
Best suited to a phone, tablet or lower-draw USB-C device when built-in cable convenience matters. Although the individual 45W USB-C rating can serve some smaller laptops, the 10,000mAh capacity label and multi-port sharing make it a smaller reserve than the laptop-class models.
Rated energy density
155.6 Wh/kgest.. Show source
estimated sourceservice.anker.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. · Converted from Anker’s listed 0.51 lb.
Weight source · checked 2026-10-07
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Availability checked 2026-10-07. Stock can change.
11
Anker · laptop
Anker Prime Power Bank (27K, 250W)
A high-capacity choice when one laptop may use up to 140W and several devices may share the pack. The 250W headline describes combined output; it is not a single-device rating.
Rated energy density
149.7 Wh/kgest.. Show source
estimated sourceanker.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight. · Explicit OEM rating for model A1340.
Weight source · checked 2026-10-07
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12
EcoFlow · laptop
EcoFlow RAPID Pro Power Bank 27,650mAh 300W with 140W Built-in Cable
A strong paper fit for laptops that accept up to 140W over USB-C and for multi-device charging. Treat 300W as the four-output combined ceiling; a single laptop port tops out at 140W.
Rated energy density
142.3 Wh/kgest.. Show source
estimated sourceus.ecoflow.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight.
Weight source · checked 2026-10-07
Review details →
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Availability checked 2026-10-07. Stock can change.
13
Goal Zero · outdoor
Goal Zero Venture 35 Power Bank
A rugged 9,600mAh-class option for outdoor carry when IP67, USB-A, and USB-C charging matter more than minimizing weight.
Rated energy density
123.8 Wh/kgest.. Show source
estimated sourcegoalzero.com ↗checked 2026-10-07 · Formula: We divide rated battery energy (Wh) by pack weight (kg); higher ranks first. This compares stored energy per carrying weight.
Weight source · checked 2026-10-07
Review details →
Check price on Amazon ↗
Availability checked 2026-10-07. Stock can change.