Energizer's Hard Case P28K smartphone has a capacity of 28,000 mAh. The talk time is estimated at 122 hours (or a little over five days), while the standby time reaches up to 2252 hours, or almost 94 days.
The device is very thick (27.8 mm) and very heavy (570 g) - more than three iPhone 15 devices combined. Avenir Telecom plans to sell the Energizer Hard CaseP28K for €249.99 when it launches in October.