fbpx
May 9, 2021

Professional Tool Reviews for Pros


21700 vs 18650 Lithium-Ion Batteries Video Review

Milwaukee RedLithium USB Hard Hat Headlamp | 21700 vs 18650

Lithium-Ion Cell Size Fuels Cordless Advancement

Around here, we primarily focus on the tools and gear surrounding the construction industry. That makes the 21700 vs 18650 conversation incredibly relevant to us, but these lithium-ion power sources reach far beyond the latest cordless tools. They’re driving innovation in Teslas, hoverboards, the vaping community, and so much more.


21700 vs 18650: What do the Numbers Mean?

21700, 18650, 20700, and others simply refer to the physical size of the lithium-ion cell. For 18650, it’s an 18 mm diameter x 65 mm length. 21700 is 21 mm x 70 mm. While the explanation is simple, the difference is profound. It’s easy to see with a quick volume calculation.

18650

3.14(9 x 9)(65) = 16,532 cubic mm


21700

3.14(10.5 x 10.5)(70) =  24,233 cubic mm

An extra 5 mm of length and 3 mm of diameter gives us 47% more volume. That’s a little more than 7,700 cubic mm of space to pack with energy-delivering anode, cathode, and electrolyte material.

Read The Full Article

Related articles

Husqvarna 220iL 40V String Trimmer

Husqvarna Trimmer Targets Homeowners Husqvarna’s battery handheld 200 Series of products come designed primarily for the homeowner. They still manage to feature some of the best aspects of their Pro models, however. That includes a lightweight design and plenty of power. The Husqvarna 220iL 40V battery-powered string trimmer edger weighs less than 10 pounds, making […]

Stihl FSA 135 and FSA 135 R Trimmers

Like Gas-Power, But Without the Emissions and Noise The battery-powered Stihl FSA 135 and FSA 135 R String Trimmers promise professional-level performance. These trimmers represent the tippy top of the Stihl battery power string trimmer lineup. Both models include brushless motors but use the same drive and cutting components found in Stihl’s professional gas trimmers. […]

Subscribe
Notify of
guest
4 Comments
Newest
Oldest Most Voted
Inline Feedbacks
View all comments
Mr Pedantic

Formula for the volume of a cylinder uses RADIUS squared not Diameter squared.

Jet

Like the brickies mask, ha ha

Nguyễn Tâm

Cell này rẻ mua ít về đóng pin cho mấy con máy cỏ chơi e Hoàn Hảo 🤪

4
0
Would love your thoughts, please comment.x
()
x