Latest SRM FSA Powermeter now has a user changeable battery that lasts a claimed 4,000 hours

SRM have launched a new FSA Powermeter that features for the first time a user changeable battery, using the axle to store two AA batteries. Previous SRM Powermeters had to be sent back to Germany to have a depleted battery changed, so this is a step in the right direction for the company; many other power meter batteries can easily be changed or charged by the user.

The new SRM FSA K-Force Light UCB (User Changeable Battery) chainset stores two AA batteries inside the axle. They’re replaced by removing the non-driveside crank arm. The FSA K-Force Light BB386 EVO with the SRM Powermeter spider weighs a claimed 784g (not including the bottom bracket) with hollow carbon fibre arms and a 30mm aluminium axle.

It’s currently only being offered with a 50/34 (110mm BCD), with a 130mm BCD coming soon which will mean a standard 53/39 option. Crank arm lengths available include 170, 172.5 and 175mm. The cranks will fit most bottom bracket standards, including  BB386, BB30, PF30 and BBRight.

Like all SRM Powermeters, the new FSA K-Force Light UCB is assembled by hand at the company’s facility in Julich, Germany. They’re supplied with a three year warranty. Price is $2845, we’ll confirm the UK price when we get it.

This is a major step forward for SRM, a company which have long been the go-to choice for power meters, and certainly favoured by professional racing cyclists (though some teams are switching to other systems, like Team Sky to Stages at the beginning of the year). In recent years we’ve seen the power meter market explode, with many more options to choose from, and some making them much more affordable, though generally they still command high prices. There’s the Garmin Vector, Stages, Quarq, Brim Brothers, Power2Max to name just a few.

More at www.srm.de

David has worked on the road.cc tech team since July 2012. Previously he was editor of Bikemagic.com and before that staff writer at RCUK. He's a seasoned cyclist of all disciplines, from road to mountain biking, touring to cyclo-cross, he only wishes he had time to ride them all. He's mildly competitive, though he'll never admit it, and is a frequent road racer but is too lazy to do really well. He currently resides in the Cotswolds.


Nick T [1121 posts] 3 years ago

Hmm.. I'm not entirely sure about shoving AAs inside the spindle. That opening is right where I'd want to putting generous amounts of grease, and grease has a habit of working it's way all over the place.

CanAmSteve [257 posts] 3 years ago

First, men on the moon. And now this. Technology has no bounds.

pwake [437 posts] 3 years ago

Nice idea, but they haven't really addressed the major issue with their system -price.
I used to have an SRM unit and it was not a big deal to have to send it back (to Colorado for US users) as the battery lasted for about forever anyway.
As soon as I saw the Stages system my SRM was on eBay and that sale covered the cost of the brand new Stages kit; well happy.