Please help will this battery power my dash cam?

attila_

Hi,

I have purchased the following dash cam: Z-Edge Z3D from amazon.

The user guide says it has the following power requirements:


INPUT: DC 12-24V, OUTPUT: DC 5V 2.4A

I would like to keep it on in the car with the engine off (and I don’t want to hard wire it into the car). I want to purchase a battery pack.

I need it to run for about 10 hours at the time.

Can I check I have done this correctly:

At 5V and discharge of 2.4amp a 27ah battery will give me 11.25 hours?

If so, then would this power pack work for the dash cam?

https://www.amazon.co.uk/imuto-27000mAh-Portable-External-Nintendo/dp/B07R56397D/ref=mp_s_a_1_21?keywords=5v%2Bbattery%2Bpack&qid=1573676602&sprefix=5v%2B&sr=8-21&th=1&psc=1


Thank you very much!

Owain_Moneysaver

attila_ wrote: »

At 5V and discharge of 2.4amp a 27ah battery will give me 11.25 hours?

That's a theoretical maximum. The actual time will depend on the battery capacity at the 2.4A discharge rate which isn't stated in the specification for most of these devices.

Some batteries are intended for long slow discharge rates, others for short heavy discharge rates, and they will perform badly when used for the wrong application.

On the upside, your dash cam may actually use quite a bit less than 2.4A, so the battery might last longer than expected.

attila_

Thank you.

How about this one:
https://www.amazon.co.uk/imuto-27000mAh-Portable-External-Nintendo/dp/B07FL6X91T/ref=mp_s_a_1_21?keywords=5v+battery+pack&qid=1573676602&sprefix=5v+&sr=8-21


It says 3.4a discharge max?

that

Also in colder weather the battery's capacity is much lower, so you need a bigger battery what ever material it is constructed of.


"8. Never overcharge a LiPo battery. Typically a full charge is 4.2v per cell. Never “trickle” charge a LiPo battery.

9. Never discharge a LiPo battery below 3.0v per cell. Ideally you never want to go below 3.2v per cell to maintain a healthy battery. 2.9v per cell and lower is causing permanent damage.

10. Never leave your LiPo batteries sitting around on a full charge for more than 2-3 days. If by the 3rd day you realize you are not going to use your battery today, you need to discharge your battery down to 3.6v-3.8v per cell for safe storage until you are ready to use the battery again.

11. Always store your LiPo batteries at room temperature. Do not store them in a hot garage, or in a cold refrigerator. Even though a cold battery has less chemical reaction taking place which can prolong its lifespan, taking a battery out from a cold fridge can cause condensation to occur on the inside of the battery, which can be very dangerous.

12. Always remember that heat is the number one enemy of LiPo batteries. The hotter your batteries get, the shorter their lifespan will be. Never charge a battery that is still warm from usage, and never use a battery that is still warm from charging.

13. Depending on how they are used, most LiPo batteries typically do not last longer than 300 charge cycles. Leaving them around on a full or depleted charge all the time, running them completely dead, or exposing them to high temperatures will shorten this lifespan dramatically.

lipo battery bag 14. LiPo batteries do not work well in cold weather. The colder it is, the shorter your run times will be due to the slowing down of the chemical activity within the battery. If it is below 14F (-10C), LiPo usage is not recommended at all. Your battery could cause your R/C vehicle to suddenly fail without warning in these temperatures.."
https://thedronegirl.com/2015/02/07/lipo-battery/

https://www.dnkpower.com/lithium-polymer-battery-guide/#chapter4

Owain_Moneysaver

attila_ wrote: »

Thank you.

How about this one:
https://www.amazon.co.uk/imuto-27000mAh-Portable-External-Nintendo/dp/B07FL6X91T/ref=mp_s_a_1_21?keywords=5v+battery+pack&qid=1573676602&sprefix=5v+&sr=8-21


It says 3.4a discharge max?

Same issue - you do not know exactly how much current your camera draws, and you do not know the capacity of the battery at that discharge rate (and how many times the battery will take a full charge after such a discharge).