What is the max charge rate (in amps) that I can charge this using my balance charger?

Personally I wouldn't charge max rate will ruin battery faster and u will have shorter usage bcus of quick power loss. It should say n specs on package.

Will this battery work in a stock arrma new big rock 2020

No it will not, the big rock can only take up to a 3s lipo and this is a 4s. The big rock also has the ic5 connector as this battery comes with an ic3 so it won't plug in. This is also a 2200mah pack, I would look for at least a 5000mah to get a decent amount of run time.

Who sells a LiPo battery safe bag or case?

Hobby stores like Horizon Hobbies, Tower Hobby or Hobby Town

How long is the battery life? Also, how long does it take for the battery to charge.

Hello , Hard to tell you how long is the battery life , Depend to your utilisation , way storage , shock in the car , etc ... For the charge : approximatly 2h hours to full charge . Have a nice day

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Spektrum 14.8V 2200mAh 4S 30C Smart LiPo Battery: IC3

Spektrum 14.8V 2200mAh 4S 30C Smart LiPo Battery: IC3

Product ID: 566013966

Details

Battery capacity
2200
Battery cell composition
Lithium
Brand
Spektrum
Number of batteries
1 Lithium
Recommended uses for product
Hobby

⚡14.8V high-voltage power

🔋2200mAh long-lasting capacity

🔥30C high discharge rate

Description

⚡ Charge Fast, Fly Far, Win Big!

TRUSTED BY PROS - Spektrum’s precision engineering and Horizon Hobby’s quality guarantee keep you flying with confidence.
ENDURANCE THAT LASTS - 2200mAh capacity ensures extended run times so you stay ahead of the pack.
RAPID RESPONSE READY - 30C discharge rate supports aggressive acceleration and instant power bursts.
SMART SAFE CHARGING - IC3 connector compatibility for seamless, secure, and efficient charging every time.
POWER UP YOUR PERFORMANCE - 14.8V voltage delivers consistent, high-energy output for peak RC action.

The Spektrum 14.8V 2200mAh 4S 30C Smart LiPo Battery with IC3 connector is a high-performance rechargeable power source designed for RC enthusiasts. Combining a robust 14.8V output, substantial 2200mAh capacity, and a rapid 30C discharge rate, it delivers reliable, long-lasting energy for demanding applications. Engineered by Horizon Hobby and optimized for smart charging, this battery ensures safety, efficiency, and professional-grade performance.

Specifications

ASIN	B07HP594C1
Antenna Location	Hobby
Battery Capacity	2200
Battery Cell Type	Lithium Polymer
Best Sellers Rank	#93,553 in Toys ( See Top 100 in Toys ) #229 in RC Batteries
Brand	Spektrum
Built-In Media	14.8V 2200mAh 4S 30C Smart LiPo Battery: IC3
Customer Reviews	4.6 4.6 out of 5 stars (438)
Global Trade Identification Number	00605482206140
Item Dimensions	14.7 x 6.4 x 5.8 centimeters
Item Type Name	Accessories
Manufacturer	Horizon Hobby
Model Number	SPMX22004S30
Number of Batteries	1 Lithium Metal batteries required. (included)
Reusability	Rechargeable
UPC	605482206140
Unit Count	1 Count
Voltage	14.8 Volts

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