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The final pieces of the puzzle for Shimano MTB new EP810 motor have been released. Aside from the slightly random model designation (why not EP802?), we can now publish the weight for Shimano’s 720Wh internal battery. Disappointingly, it features one of the lowest energy density figures on the market at 175Wh/kg. Compare that to the Avinox 700Wh battery at 220Wh/kg and you’ll see that the weight advantage of the 2.3kg EP801 drive unit is instantly wiped out. For comparison, an Avinox M2S motor and battery combined weighs 5.78kg, while the Shimano motor and battery comes in at 6.3kg. Not ideal when the Shimano EP810 outputs half the power at 750W, and 30% less torque at 100Nm. And while Avinox boasts a 12A fast charger, Shimano only offers up to 4A charging. There are plenty of updates and improvements over the previous EP801 –including a new wireless controller, integrated top stube screen, and updates to sensors along with new features such as refined Auto Shift, Auto Assist, Assist Remain Hill Hold and Carry Over (overrun) along with a new Shimano Connect App – but will this be enough to lure brands and consumers back into the fold? Face it, Avinox dominates the market and others won't invest big $ into R&D of a product that falls short in comparison. Shimano should be focused on building a durable E-MTB drivetrain because once Avinox releases their internal gearbox motor, there won't be a need for cassettes, derailleurs, chains, etc and SRAM and Shimano will be shut out of the fastest growing segment in the sport.