Would this work with RIAARIO 1:18 which comes with 1300mAh 2S batteries?

It will work on any models that use a 2S battery. 2 nuances you need to take into account the first type of the battery itself, which one do you have? lithium-polymer or Li-ion is used in the car. This is a Li-ion battery. The second point is the power connector. You may have to buy an adapter.

Can i use this in my rc rally ud-1604 brushless car ? i'm trying to upgrade to a better battery any suggestions?

All I can say is read the specs and suggestions for your motor,it's a 2s or 3s I think just small comes with 2 so if you buy 2 that's 4 batteries

Approximately how long does it take to charge the batteries with provided charger ?

Charging time is a function of your wall converters max current output ..higher amps out,less time charging

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2000mAh 7.4V Lithium Ion Battery with Dean-Style T 2S Plug Rechargeable RC for WLtoys 4WD High Speed RC Cars and Most 1/10, 1/12, 1/16 Scale RC Trucks with

2000mAh 7.4V Lithium Ion Battery with Dean-Style T 2S Plug Rechargeable RC for WLtoys 4WD High Speed RC Cars and Most 1/10, 1/12, 1/16 Scale RC Trucks with

Product ID: 711382027

Details

Battery capacity
2000 Hour
Battery cell composition
Lithium Ion
Brand
URGENEX
Number of batteries
2 Lithium Ion
Recommended uses for product
Armored

⚡7.4V Power Output

🔋2000mAh High Capacity

🔌Dean-Style T Plug Compatibility

Description

🚀 Power Your Playtime, Dominate the Track!

SAFE READY ANYTIME - Advanced Li-ion tech with no memory effect means fast, steady charging whenever you need it—no downtime, no hassle.
UNLEASH MAXIMUM RUNTIME - 2000mAh high-capacity battery fuels longer, more intense RC sessions without compromise.
DURABILITY THAT KEEPS UP - Engineered for 300+ recharge cycles, this battery outlasts the competition and your weekend races.
PRECISION POWER DELIVERY - 7.4V voltage with 15C discharge rate ensures your RC car performs at peak speed and agility.
UNIVERSAL FIT FOR RC ENTHUSIASTS - Compatible with WLtoys 4WD and most 1/10, 1/12, 1/16 scale RC cars, trucks, and boats—plug and play with Dean-Style T connectors.

The URGENEX 2000mAh 7.4V Lithium Ion Battery with Dean-Style T plug is a high-capacity, rechargeable power source designed for WLtoys 4WD high-speed RC cars and most 1/10, 1/12, and 1/16 scale RC vehicles. Delivering a robust 15C discharge rate and engineered for over 300 recharge cycles, it ensures extended runtime and reliable performance. Its universal compatibility and advanced safety features make it the go-to battery for serious RC enthusiasts seeking consistent power and durability.

Specifications

ASIN	B0B561XZRL
Amperage	2000 Milliamps
Antenna Location	Armored vehicle
Battery Capacity	2000 Milliampere Hour (mAh)
Battery Cell Type	Lithium Ion
Battery Weight	100 Grams
Brand	URGENEX
Customer Reviews	4.9 4.9 out of 5 stars (16)
Item Weight	0.22 Pounds
Manufacturer	URGENEX
Model Name	2000mAh
Number of Batteries	2 Lithium Ion batteries required. (included)
Reusability	Rechargeable
UPC	605195398989
Unit Count	1 Count
Voltage	7.4 Volts

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