DREII $4

A challenging game to help fill dead time

If you have some time to fill between appointments or on the train, try Dreii, which will test your physics and your reflexes. It's available for both iOS and Android.

This is a puzzle game with abstract graphics. There's no clock and not much on screen other than a few minimalist graphics. By tapping here and there, you grab white building blocks with your character and drag them around in a gravity field. Then you stack the blocks to hit a pulsing target and move on to the next level.

Dreii may sound simplistic, but it is fascinating and the momentum quickly builds as new block shapes are introduced and targets prove harder to reach. Each puzzle piece moves and drops into place with little difficulty, and the lovely sounds add to this experience.

Dreii also has some advanced group-playing tricks, uniting you with other players from across the Internet to complete different goals.

THE NEW YORK TIMES

CYBERPOWER UPS $150

An uninterruptible supply for power blips

If you count on your PC not shutting off mid-sentence in a power blip, try an uninterruptible power supply, or UPS. There are several UPS devices on the market, including the CyberPower.

There are consumer and office models that have capacities ranging from 450 volts to 1,500 volts. The model we reviewed handles 1,000 volts and 600 watts. The unit has five outlets that connect to the battery and are surge protectors. Another bank of five outlets are surge protectors only.

The CyberPower comes with monitoring software for both Windows and Macs that's entertaining to look at, but doesn't do much. The lights on the front panel of the UPS give a running prediction of how long the battery will last, and I especially like the CyberPower because the annoying beeps that otherwise would sound when the unit goes into full swing can be muted. The CyberPower comes with a three-year warranty, and there are replacement batteries available for as little as $30.

Most of the low- to midrange UPS batteries are designed for one user. Bigger-capacity UPS batteries are available for larger offices. But the best solution for large offices still would be a backup generator.

TRIBUNE NEWS SERVICE