​Ebike Battery Math: Volts, Amps, Amp Hou...

Dec 05, 20158 Comments

These days, awesome ebike battery packs constructed of quality 18650 cells are available to average bike builders thanks to  advances in 18650 DIY pack building


52V battery packs, plus the 3077 FET we lov...

Nov 02, 20158 Comments

For years, the electric bicycle market used legacy designations for power system voltages, like 24V, 36V and 48V. This was because the earliest systems used


Water-proofing, and basic ebike trouble-sho...

Oct 23, 20151 Comment

Sooner or later, even the most expensive ebike can have a minor glitch. The problem is that…right now there aren’t a lot of ebike mechanics


Five Large Hot Rod Hubmotors for Street E-b...

Aug 10, 20158 Comments

Direct drive hubmotors have remained popular for street E-bikes that are running hot rod amounts of power. Here is a list of some of the


The 3 Critical Components: Motor, Controlle...

Apr 07, 20154 Comments

Hot-rodding an ebike is not as simple as some people might think. That is because you need to consider three critical interlinked components when hot-rodding,


Motor tech: Learn the Terms-Part 1

May 14, 201414 Comments

Most new E-bikers don’t care about the details inside the motors that we ride, as long as they just work. But occasionally we use terms

Sinewave controller

Sine-wave controllers, making hub-motors su...

Sep 01, 20138 Comments

Sine-wave controllers are starting to get some interest, so we thought some of our readers would like to know what the benefits are, so they


GNG Gen2 750W Mid-Drive Kit Review

May 01, 20137 Comments

This is an affordable and useful mid drive, if you think you would be happy with 750W…and live where there are hills. Quite a few buyers

electric bike legality

Is My E-Bike Legal? USA Ebike Law

Apr 23, 201346 Comments

Disclaimer.  This article is not written by a lawyer, and in no way constitutes legal advice. This article is intended only as a guide to

Allcell PCM block, which holds 18650-format cells.

The Next Best Ebike Battery for 2013?

Apr 20, 201315 Comments

There is a recently introduced battery chemistry that we will likely be seeing a lot of soon. Lithium-Nickel-Manganese-Cobalt-Oxide, or LiNiMnCoO2/NMC. Since Asian battery manufacturers have