I have a question about implementing arduino battery. I thought feeding with a 3.7 V battery and use a converter to get 5V. What is the difference between the following options?
OPTION 1: - 5V DC to DC Step Up - VPack PCB: 5V DC to DC Step Up - VPack PCB - PRT-08290 - SparkFun Electronics
OPTION 2: - LiPower Shield: SparkFun LiPower Shield - DEV-10711 - SparkFun Electronics
is what you need to produce 5v,....
the other two links are more along the lines of charging a battery which in turn powers your arduino.
I know it, but I also want to charge the battery. So which option is better?
Get what suits your needs...
What are you doing anyway? Might help shed some light on what you need...
I am doing a driver based in a wireless joystick. The main components are : Arduino UNO and a Bluetooth. I want to feed the system with a battery which could be recharge.
If you can, avoid lithium poly batteries !!!!
The only applications I would use them for are high current draw projects like r/c motors used outdoors.
They are very dangerous should you miss handle them in just about any way, lithium reacts violently with oxygen. The cells can be damaged easily from mischarging, discharging, temperatures, and so on. When a cell is damaged it will produce gas, usually this is contained by it coverings, but if that fails it may explosively pop followed by very hot burning chemical fire.
If your just powering an arduino switch to something more traditional or it's safer cousin lithium iron. Less voltage per cell, still has the same if it leaks risks but considered more stable, less likely to fail from miss handling.
Thank you. the type of battery you propose Is conventional alkaline battery?
I want the battery can be recharged without removing it from the device. With the kind of batteries you propose, how would implement it?
On the other hand, most mobile phones use lithium polymer batteries or lithium ion. Only in extreme situations can give explosions, right?
The risk of explosion is rare, should the safety seals fail it's likely that a small hole starts venting the gas which immediately catches fire on exposure to the air which may result in popping sounds. YouTube lithium poly batteries.
Lithium ion is considered fairly stable which is why it's allowed on airplanes in laptop batteries. Although it's probably because there all encased in a hard, well sealed chamber in the event that they fail.
The reason you use lithium batteries is because they give very high current with small form factors.
If you have no need for high current or a small battery sizing, the risks probably aren't worth it.
What you end up using doesn't really matter as long as they can provide the voltage/current required and you can find a charger for that type and happy with the form factor to risk ratio.
I'm lookin foe the driver be as small and thin as possible because it will be a portable device. For that reason I had chosen a lithium batteries. Thanks for all information.
harddrive123:
The reason you use lithium batteries is because they give very high current with small form factors.
The reason to use lithium batteries is not usually the high current (nickel-cadmium is usually at least as good), but high energy density - for size and for weight. Generally, nobody wants it to be any bigger or weigh any more than it needs to.
There are other criteria - nickel-cadmium batteries self-discharge relatively rapidly.