The Good The Energizer Energi To Go is effective and easy to use.
The Bad The Energizer Energi To Go is optimized to run off lithium batteries, and it won't work with all cell phones.
The Bottom Line The Energizer Energi To Go is an excellent resource for emergency cell phone power on the go.
Energizer Energi To Go (Samsung)
If you're a road warrior who's on the go constantly, there's a good chance you won't always be near a wall socket or in your car when your phone's battery begins to peter out. While several manufacturers have answered this need with a variety of emergency cell phone chargers, the execution hasn't always been as good as the idea. But the latest entry from Energizer does the job and does it well. Amazingly simple in form and function, the Energi To Go provides quick, easy, reusable power for cell phones on their last leg of battery life. We don't love that it's optimized for running off lithium batteries, and it won't work with every phone on the market, but the Energi is worth picking up if you're a frequent talker who needs the extra juice. It's also fairly priced at $19.99.
It would be difficult for the Energi to have a more minimalist design. It consists of just two parts: a gray-and-silver oblong battery holder and a short power connector. Energizer sells adapters for most Samsung, Sprint, Motorola, and Nokia handsets, while a USB version is available as well. Energizer claims that 80 percent of cell phone brands are supported, but we weren't able to find a connector for a Sony Ericsson.
To use the charger, you first must put the supplied lithium AA batteries into the holder. The cover is a bit tricky to pry off, but it's solidly constructed. Once the batteries are in place, insert the cord into the holder and plug the adapter into the phone. In our tests, within seconds, the blue light on the holder started flashing and our Samsung SGH-D357 started receiving a charge. When we started the test, the SGH-D357's was about 25 percent depleted, but it was fully charged after about 30 minutes.