The ShunTongDa 48V 14Ah external battery pack is designed specifically for Rad Power ebikes, including the RadExpand 5, RadWagon, RadRunner 2, and RadWagon 4 and 5. Unlike the built-in DCH-006 batteries that slide into the frame of folding ebikes, this is an external pack that mounts to the bike using a pre-installed base and connects through XT-60 connectors. At 672Wh of total capacity, it provides a solid range extension for Rad Power owners who want to go further on a single charge. The listing has earned a 4.4 star rating across 9 reviews, and ShunTongDa backs it with a 12-month warranty and 30-day return policy.
Specs and Build Quality
The ShunTongDa pack runs at 48V nominal with 14Ah capacity for a total of 672Wh. The listing states it uses automotive-grade A cells, which generally refers to higher quality 18650 lithium-ion cells that are manufactured to stricter tolerances than standard cells. ShunTongDa claims the battery retains 80 percent or more of its original capacity after 800 charge cycles, which is a reasonable lifespan estimate for quality lithium-ion cells.
Physical specs
The battery measures 380 x 89 x 95mm and comes with a mounting base pre-installed for Rad Power bikes. The housing is described as waterproof with all-weather durability, and the pack includes an anti-theft lock and LED power indicator built into the housing. The compact dimensions make it suitable for mounting on most Rad Power frames without interfering with the riding position or pedal clearance.
BMS and motor compatibility
The 30A BMS handles overcharge, short circuit, and temperature protection. At 48V, a 30A continuous discharge supports up to 1440W of output, and ShunTongDa rates the battery for motors up to 1200W. Most Rad Power bikes run 750W motors, so the BMS has enough headroom to allow for a steady stream of power while riding uphill and during heavy pedaling. The XT-60 connectors are a standard in the ebike world and provide a reliable, low-resistance connection between the battery and the bike's electrical system.
Form Factor and Compatibility
This is an external battery pack, meaning it mounts to the outside of the bike frame rather than sliding into an internal battery compartment. ShunTongDa lists compatibility with the RadExpand 5, RadWagon, RadRunner 2, and RadWagon 4 and 5. The battery comes with a pre-installed base and XT-60 connectors, so installation is meant to be straightforward without any rewiring.
The external form factor makes this battery more versatile than built-in packs because it does not depend on a specific internal battery slot shape or dimensions. However, you still need to confirm that your Rad Power bike uses a 48V system with XT-60 connectors. If your bike uses a different connector type, you would need an adapter or different battery entirely.
For a wider selection of 48V batteries across all form factors, check the battery comparison table where you can sort and filter by voltage, capacity, and price per watt-hour.
Real-World Range Estimates
ShunTongDa claims a range of 55 to 200 kilometers per charge, though that upper number is extremely optimistic and likely assumes very light pedal assist on flat terrain. A more realistic range for most riders would be 35 to 55 miles (roughly 55 to 90 kilometers) depending on motor size, terrain, rider weight, and assist level. On flat terrain with moderate pedal assist and a 750W motor, lighter riders should be able to approach 50 miles on a single charge. Heavier riders using full throttle over hilly terrain will see range drop toward 30 miles or less.
At 672Wh, this pack offers more capacity than the standard batteries that ship with most Rad Power bikes. For riders who regularly run out of juice before finishing their route, adding this external pack as a second battery or replacing a worn-out original pack can make a noticeable difference in daily range.
What Amazon Reviewers Are Saying
The ShunTongDa 48V 14Ah Rad Power battery holds a 4.4 star rating across 9 reviews on Amazon. The listing has been available since July 2025, so it has had some time to accumulate buyer feedback.
Positive reviews mention that the battery fits Rad Power bikes as described and that the XT-60 connectors make installation quick and simple. Buyers appreciated the included mounting base, which eliminates the need to source a separate mounting solution. The LED power indicator was also called out as a helpful feature for monitoring charge levels during rides.
Some reviewers mentioned the typical concerns that come with purchasing a third-party battery from a less well-known company, particularly around long-term durability and what kind of customer support they could expect. The 12-month warranty and 30-day return policy help alleviate some of those concerns.
If you want the most current buyer feedback, check the latest reviews on Amazon to see if the review count has grown since this article was written.
Who Should Buy This
The ShunTongDa 48V 14Ah external battery is a good fit for Rad Power bike owners who need a replacement battery or want to add a second pack for extended range. The external form factor with XT-60 connectors and pre-installed mounting base makes installation straightforward, and the 672Wh capacity provides more energy than most stock Rad Power batteries. The 4.4 star rating across 9 reviews gives reasonable confidence in the product, though buyers are still somewhat early adopters given the July 2025 availability date.
Before ordering, confirm that your specific Rad Power model uses 48V and XT-60 connectors. The listing calls out the RadExpand 5, RadWagon, RadRunner 2, and RadWagon 4 and 5 as compatible models, but variations can occur between production runs. The 12-month warranty provides a safety net if anything goes wrong.
For more 48V battery options, browse the ebike battery reviews or compare all batteries by price per watt-hour on the comparison table.
Frequently Asked Questions
Which Rad Power bikes is this battery compatible with? The listing calls out the RadExpand 5, RadWagon, RadRunner 2, and RadWagon 4 and 5. Confirm that your specific model uses a 48V system with XT-60 connectors before ordering.
Is this an internal or external battery? This is an external battery pack. It mounts to the outside of the bike frame using a pre-installed base rather than sliding into an internal battery compartment. The XT-60 connectors plug directly into the bike's wiring.
How long does it take to charge? ShunTongDa estimates roughly 7 hours for a full charge from empty. The charging time is longer than smaller capacity packs due to the higher 14Ah capacity.
Does this battery include a mounting base? Yes, the battery comes with a pre-installed base designed for Rad Power bikes. You should not need to purchase a separate mounting solution.
How many charge cycles can I expect? ShunTongDa claims the battery retains 80 percent or more of its original capacity after 800 charge cycles. With regular daily use, that translates to roughly 2 to 3 years before noticeable capacity degradation.
Can I use this battery as a second pack alongside my original battery? That depends on your bike's wiring setup. Some Rad Power bikes can accommodate a second battery connected in parallel, while others may need a dual-battery adapter. Check your specific model's documentation or consult with the seller before purchasing for dual-battery use.