Originally Posted by
resnick
The problem is the size of the battery for the power demands of a BiPAP. At 12V x 3A, that's 36W (max, which it probably won't run most of the time, but even so....). If he thinks he's going to get a full 8 hours, that's a max of 288 Watt Hours of power.
BatteryGeek's 200WH battery (which should get you by) is $500.
I wouldn't bother with their specific
CPAP batteries. They are effectively the same as their
Portable Power Station (PPS) batteries, but you can't charge them and use them at the same time. The normal
PPS has all of the tips you need for a CPAP anyway. Look at either the
PPS, the
Super Portable Power Station 12-222, or the
SPPS 12-444. (The latter is a $900 battery. Yikes!
)
Ooooo....I forgot that for the new year, there's the new
TSA battery requirement:
The following
quantity limits apply to
both your spare and installed batteries. The limits are expressed in grams of “equivalent lithium content.” 8 grams of equivalent lithium content is approximately 100 watt-hours. 25 grams is approximately 300 watt-hours:
- Under the new rules, you can bring batteries with up to 8-gram equivalent lithium content. All lithium ion batteries in cell phones are below 8 gram equivalent lithium content. Nearly all laptop computers also are below this quantity threshold.
- You can also bring up to two spare batteries with an aggregate equivalent lithium content of up to 25 grams, in addition to any batteries that fall below the 8-gram threshold. Examples of two types of lithium ion batteries with equivalent lithium content over 8 grams but below 25 are shown below.
So, everything but the
SPPS 12-444 mentioned above is a legal battery.