Home > Consumer Reviews > Black & Decker CP120B 20-Watt Power Backup Battery Pack

Don't know if discontinued product was out of commission for some time, but the battery I've received could not hold a charge (via USB) for more than 10 minutes. This was only used to charge a blackberry via USB which product designs mention should hold for more than 10 minutes. After charge, my blackberry only increase 3% battery power...

My unit will charge, and power on. However it completely discharges in less then 10 minutes when charging my ipod. This has a 1200mAh battery in it. A 30gb 5th gen ipod has a 450mAh battery. You should be able to get 2 complete charges on your ipod, but my unit wont even get 1/4 of a charge.

There are two sizes, the small 800 MAH unit (2 hours) & the large 2000 MAH (5 hours) unit. I purchased the small 10 watt unit & was VERY disappointed so I returned it. It took 17 hour charge for only 2 hours of my XM radio use which was insane. I then purchased the 'heavy' 20 watt unit with much better results. I used it to power my XM radio for 5 hours and it works well to recharge my cell phone twice. It will also power a LED 2 watt (45 watt equiv) light bulb for 7 hours. It also charges in 17 hours but the power available is more satisfactory. I WILL KEEP IT. It will work better if the Lithium Ion version is ever developed.

This is a must have item for every home! I was without electricity after Hurricane Ike and I was able to fully charge my cell phone and iPod using the battery pack. When my electricity was restored, I was able to charge it and pass it on to friends without service so that they can at least charge their phones. This process will continue until everyone's service is restored. I am ordering some to give as Christmas gifts.

I was interested in using this 20 watt battery pack to power my modem/router during power outages so that I could have internet access. Testing a fully charged unit, I set my laptop to stream internet radio and the B & D device powered my modem/router (a Zoom ADSL X6) for 1 hour and 10 minutes. Since this product has a niMH battery and I was concerned about self-discharge, I ran another test after the battery pack had been recharged and then unplugged and left alone for a week. This time it powered the modem/router for just over an hour. I also used it to power the Zenith DTT 901 tv converter box and got over 2 hours viewing time with it. I also tested a second unit with nearly identical results.

I have seen numerous complaints about these units - underperforming or not working on various electronics, so maybe I was just lucky, but I am exceptionally well pleased with this product and have purchased several more for family members.