 |
| Business end of a HyperMac MBP-060 |
Sunday, May 29, 2011
HyperMac portable battery backup for your MacBook
Saturday, May 28, 2011
Callpod Duo vs Energizer XP4001
 |
A very small & weak connector on the Callpod Duo |
Problem with the Callpod is those small mini USB style connectors, on my personal Callpod Duo both were broken in a matter of weeks. This isn't helped by the strain of their very short adapter cables if you're trying to charge your phone in a backpack or purse for example. The use of a custom connector allows the Callpod to support more than just a 5V output, I just wish they used something that could handle the stress of everyday use.
 |
| Common & robust albeit less configurable USB A connectors |
Energizer XP4001 (20Wh unconfirmed)
The XP4001 is rated for 4Ah @ 5V unconfirmed (I've yet to figure out how to crack it open without damaging it) It also has a power on button as the unit will power down the USB ports when there is nothing plugged into them.
On a side-note, I wish battery manufactures would post Wh ratings instead of the near useless Ah rating. An Ah (Amp Hour) rating gives only half the information needed to determine just how much capacity the battery has. Example, the Callpod Duo is rated for 4.4Ah (4400mAh) but no voltage is given. Now if it were 5V then the Duo would be 22Wh (4.4 x 5) but it's not, the Callpod Duo sports two 2.2Ah @ 3.7V battery packs or 16.28Wh.
Apple posts their battery specs in Wh, your home electricity bill is determined by KWh (Kilo Watt hours). Windows laptops on the other hand use mAh (milli-Amp hours) just because it sounds impressive but can also be misleading. Need another example, a 1Ah @ 100V battery is 100x more powerful than a 1Ah @ 1V battery...
On the plus side the Callpod does charge an iPad where as the XP4001 does not*.
*the XP4001 will slowly charge an iPad that's in standby.
Subscribe to:
Comments (Atom)