Norco 900 WH Battery

Running out of juice before the fun is over isn't ideal, which is why Norco developed their own line of Shimano-approved batteries that use 21700 cells. The new battery system has a greater energy density than the prior generation, which means higher energy amounts are possible at a lighter weight.

The batteries are available in 540, 720, and 900 Wh capacities. Why wouldn't you purchase the biggest battery available? Well, other than price, there's also a weight penalty of 690 grams, or 1.5 pounds with each capacity increase. The claimed weights for each battery are as follows:

• 540 Wh: 3190g
• 720 Wh: 3880g
• 900 Wh: 4570 g

That means the 540 Wh battery weighs 3 pounds less than the 900 Wh battery. That 900 Wh battery happens to be the largest capacity battery currently on the market. All of the batteries can easily be slid out from the downtube for off-the-bike charging or for a quick mid-ride swap.