Reasonably hot APC notebook case with power inverter $30 AR @CUSA

[Yo2]

This is a decent notbook case but the kicker is the included power inverter which lets you connect from 110/220, car or airplane outlets to many different notbooks(adapters included) as well as charge additional devices (PDA and Cellphones via USB based power adapter(sold separately typically about $20))

Saves carrying different power supplies and at $30 it's cheaper than most notebook power adapters alone.

$30 Case is artificial leather - a ballistic nylon case is available for another $30 ($60 AR)

Yo

 

[venk]

where?

 

[Yo2]

Comp USA $50 instant off $20 MIR

Topic edited

 

[kalster]

can you be more precise?
model no? direct link or something?

 

[Yo2]

This is the APC powercase and the APC powercase ballistic nylon. It is in their weekly flyer last page at least here on the westcoast. Not sure if this is online as well. A similar power converter typically goes for $70-100 alone no case and this one is sweet since it also charges pda and cellphone via usb based chargers ($15-20 accessories)

 

[weepul]

linkified for the lost:

TravelPower Case, Ballistic Nylon $59.99AR
TravelPower Case, Synthetic Leather - $29.99AR

the ad itself

//krunk (^_^x)

 

[cyberhh]

oos online and near me - I need to return the one I bought 3 weeks ago and catch the new price.

 

[theairman]

SOLD OUT!!!!!!!!!

 

[kalster]

dumb question

the power rating for the power adaptor is 75 watts, my laptop battery is 72W, can i sitll use it safely?

 

[Yo2]

Basically both numbers have nothing to do with one another. As long as the voltage is between 15 and 20V this thing should charge any laptop battery.

The power adaptor rating indicates how fast it may be able to recharge a battery. 75W means it can provide up to 5A into a 15V battery or 3.75A into a 20V battery. This corresponds to the duration it will take to recharge the battery.

The battery rating in( also in watts e.g. 72W or 94W ) is basically just a number that states how long the battery will last.

 

[Jenova314]

Originally posted by: Yo2
Basically both numbers have nothing to do with one another. As long as the voltage is between 15 and 20V this thing should charge any laptop battery.

The power adaptor rating indicates how fast it may be able to recharge a battery. 75W means it can provide up to 5A into a 15V battery or 3.75A into a 20V battery. This corresponds to the duration it will take to recharge the battery.

The battery rating in( also in watts e.g. 72W or 94W ) is basically just a number that states how long the battery will last.

where do i begin... wattage is the RATE of power delivered, you got that right in the 2nd paragraph, but then changed your mind again in the third paragraph when you used wattage as CAPACITY.

lets deal with the second paragraph first. the max power rating on an adapter is usually the maximum wattage an adapter can push through, NOT how quickly it can charge a battery. the amount of current used to recharge the battery is determined by the internal circuitry within your laptop. if you try to pump 5A into a battery to recharge it, you'll find yourself looking for another battery on eb@y pretty soon (unless it's a huge battery).

now your third paragraph.... the battery rating in W (if they actually have a rating like that) would be the maximum rate of output power able to be delivered from the battery, NOT the capacity. capacity would have to be power*time, or watt-hour, or Wh. hope this helps. so to answer kalster's question: yes you can use the adapter safely since your laptop never really draws power to the maximum wattage anyways.

 

[Yo2]

Originally posted by: Jenova314

Originally posted by: Yo2
Basically both numbers have nothing to do with one another. As long as the voltage is between 15 and 20V this thing should charge any laptop battery.

The power adaptor rating indicates how fast it may be able to recharge a battery. 75W means it can provide up to 5A into a 15V battery or 3.75A into a 20V battery. This corresponds to the duration it will take to recharge the battery.

The battery rating in( also in watts e.g. 72W or 94W ) is basically just a number that states how long the battery will last.

where do i begin... wattage is the RATE of power delivered, you got that right in the 2nd paragraph, but then changed your mind again in the third paragraph when you used wattage as CAPACITY.

lets deal with the second paragraph first. the max power rating on an adapter is usually the maximum wattage an adapter can push through, NOT how quickly it can charge a battery. the amount of current used to recharge the battery is determined by the internal circuitry within your laptop. if you try to pump 5A into a battery to recharge it, you'll find yourself looking for another battery on eb@y pretty soon (unless it's a huge battery).

now your third paragraph.... the battery rating in W (if they actually have a rating like that) would be the maximum rate of output power able to be delivered from the battery, NOT the capacity. capacity would have to be power*time, or watt-hour, or Wh. hope this helps. so to answer kalster's question: yes you can use the adapter safely since your laptop never really draws power to the maximum wattage anyways.

Your comments are mostly correct. I was deliberately trying not to discuss this matter on the level of an EE student, but to merely give within my limited time a simple answer that anyone here can understand. You seem to have a lot more time on your hands, so you may be interested in the following:

I tried to reflect the difference between the two types of usage for "Watts" introduced by kalster. Obviously battery cappacity would have to be provided in Ah (amperehours = for how many hours does this battery deliver 1A). Some companies (like Dell) do actually provide a Watt rating. Why - I can only guess - they may not want to get into the nitty gritty about how long exactly the battery lasts versus what it's adverised at . OTOH this makes it easy for the customer to purchase the battery (more "watts" = more capacity)