Battery life is a common concern with smartwatches, not only because you don’t want your smartwatch to die halfway through the day, but also because a lot of folks dread having another device to plug in. LG is aware of these concerns and has crafted a unique battery to address them.

LG Chem has created a hexagon-shaped battery for smartwatches that has 25 percent more capacity than rectangular batteries. Woo Byeong-min, an LG Chem spokesperson, says that this added capacity will increase smartwatch battery life by 4 hours. 

The hexagonal batteries are already being sold to unspecified tech firms, but it’s unclear when we’ll see a smartwatch with a hexagon battery actually hit the market.

These hexagon-shaped batteries are a bit larger than a rectangle battery, but because they’re not just a larger rectangle, they allow for more battery capacity without requiring a substantially larger watch case. Round smartwatches are popular because they look more like a traditional analog watch than square-faced smartwatches, and we’re expecting to see new round watches from companies like Motorola and Samsung this year, so it’s exciting to see a new battery that can give that type of devices better battery life.

Do you have a preference between square and round smartwatches?