The unannounced Galaxy S5 smartphone is reportedly going to pack a fast-charging Li-ion battery that will offer a bigger charge than its predecessor. At 2900mAh, the Galaxy S5’s rumored battery would have slightly more battery juice than the Galaxy S4, which has a 2600mAh battery. Even so, the Galaxy S5 battery is said to be about the same size of the Galaxy S4’s battery, Phone Arena reports, as the new battery would be able to store 20% more energy without seeing any size modifications.

More interestingly, the battery would be able to recharge in under two hours, according to the publication. However, battery life estimates for the Galaxy S5 have not been leaked yet.

Samsung, meanwhile, is yet to confirm any details regarding its upcoming flagship handset. The Galaxy S5 is rumored to be announced during a mid-March London-based event and launched in the following weeks, possibly alongside a new Galaxy Gear smartwatch version. When it comes to specs, the phone is said to pack a 5.25-inch display with 2560 x 1440 resolution, Exynos 6 / Snapdragon 805 CPU, 16-megapixel camera and to run Android 4.4 KitKat out of the box.

UPDATE: The story has been updated to correct a previous version that said a company may be involved in making such batteries for Samsung.