The Sherpa 100PD has two features that we particularly like – you cannot overcharge it so you can keep it plugged in and use it as a Qi charger mat. And it has a digital percentage of remaining life readout.
It is 5V/1A or 5W. That is enough to charge most smartphones albeit that it takes over eight hours to charge a Samsung Galaxy Note9 when a 15W Qi charger will do it in three hours. Still, it is more than enough to overnight charge.
The battery is [email protected] We measured the mAh rate at a constant 5V/2A draw and after typical charging efficiency loss got the equivalent of 35,000mAh hours useful charge from it – again like similar power banks.
If you have a 4,000mAh battery smartphone, it will recharge about eight times – more for lower mAh batteries.
We attached a Lenovo Yoga 930 (GadgetGuy review here), and it uses a 65W charger for a 60W, 7820mAh battery. Using the Sherpa 100PD, it charged from 0-100% in just over two hours, which is very marginally slower than the 65W wall charger. We got about two recharges from it.
GadgetGuy’s take – Sherpa 100PD – trust a Sherpa
It is a very well-made device from a company that understands power.