The ACEFAST M21 is a high-capacity 20,000mAh power bank built for fast, flexible charging. Its USB-C port and built-in USB-C cable deliver up to 65W PD/PPS—powerful enough for many laptops, tablets and phones—while the USB-A port provides up to 22.5W for legacy devices. You get a clear LED digital display for exact battery percentage and a fast-charge indicator, pass-through charging so you can top up your phone while the bank recharges, and a durable flame-retardant PC shell with multi-protection electronics. Compact at 108×68×32.5 mm and ~345 g, the M21 is a reliable daily backup for Android, iPhone and laptop users in Bangladesh.