@ mba-man,
Assuming that the batterys are not defective or damaged, there is no difference in safety between sizes; the only differences will be the battery size, weight, and the length of runtime with your computer.
This should work for the batteries you mentioned:
http://www.batteryspace.com/pcbfor148vli-ionbatterypack5alimitwithfuelguagesocket.aspx
[Edit: the link doesn't work here; paste this after the www dot in the address:
batteryspace.com/pcbfor144v148vpack.aspx
The price is US $6.75.
I’ve purchased cells and protection curcuts from batteryspace before, and their tech support people are knowledgeable, friendly, and quick to respond, even though I only make small just-for-my-own-use orders; I do recommend them.
Batteryspace offers a good variety of protection circuts, or you can search Ebay or Amazon for “battery protection circuit” for more choices; keep in mind that there are many different configurations, and be sure to get one that suits the number of cells in your pack.—This thread discusses 4S (four cells in Series) and 5S (five cells in Series) battery packs, and while some protection circuts will protect either, a circut designed to protect 2 to 4 cells will not protect a 5 cell pack.
The protection circuts designed for model aircraft are intended mainly to cut power to the model’s motor, while leaving the control servos powered, so that the aircraft can be landed instead of crashing. These can easily be adapted to cut power output without giving an audible warning, but that may be beyond what many here are capable of. That being said, a loud alarm won’t do any harm beyond annoying people, and it will protect the battery pack.
I hope that this helps.
Assuming that the batterys are not defective or damaged, there is no difference in safety between sizes; the only differences will be the battery size, weight, and the length of runtime with your computer.
This should work for the batteries you mentioned:
http://www.batteryspace.com/pcbfor148vli-ionbatterypack5alimitwithfuelguagesocket.aspx
[Edit: the link doesn't work here; paste this after the www dot in the address:
batteryspace.com/pcbfor144v148vpack.aspx
The price is US $6.75.
I’ve purchased cells and protection curcuts from batteryspace before, and their tech support people are knowledgeable, friendly, and quick to respond, even though I only make small just-for-my-own-use orders; I do recommend them.
Batteryspace offers a good variety of protection circuts, or you can search Ebay or Amazon for “battery protection circuit” for more choices; keep in mind that there are many different configurations, and be sure to get one that suits the number of cells in your pack.—This thread discusses 4S (four cells in Series) and 5S (five cells in Series) battery packs, and while some protection circuts will protect either, a circut designed to protect 2 to 4 cells will not protect a 5 cell pack.
The protection circuts designed for model aircraft are intended mainly to cut power to the model’s motor, while leaving the control servos powered, so that the aircraft can be landed instead of crashing. These can easily be adapted to cut power output without giving an audible warning, but that may be beyond what many here are capable of. That being said, a loud alarm won’t do any harm beyond annoying people, and it will protect the battery pack.
I hope that this helps.
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