Extended battery life is essential as these technicians are often in the field for an entire shift.
As a result, Panasonic has always offered industry-leading battery life in its rugged line of Toughbook mobile computers.
When Panasonic launched the ultra-mobile Toughbook U1, it introduced a new feature – twin hot-swappable batteries. Customers immediately saw the value in this function, and Panasonic continued to integrate twin hot-swappable batteries in the Toughbook H1 Health and H1 Field.
The hot-swap capability means that a device includes two high-capacity battery packs, not merely a main battery and a small “bridge” battery. This allows users to change a battery without having to turn the power off or reboot the system, extending running time. Plus, it removes the burden of having to swap your main battery in a very short time, which is not always practical. Using a battery charger, you can keep spares fully charged and take them with you. In situations where you can’t run on AC power or recharge batteries, this reserve power can make a significant difference.
For nurses or other mobile workers that select a device from a number of units on a charging rack, Panasonic has designed the C1 to clearly indicate up to four charge levels at the front edge of the case. At a quick glance, you can tell how much power each battery has. Without this feature, machines would be selected at random. If a device with a low charge was chosen, the battery could die during offsite duties – resulting in significant downtime and lost productivity. Of course, the ability to swap in a charged spare could help mitigate that.

Source: toughbloggers