Rad Power Bikes has one of the largest customer bases in the North American ebike market, and the challenge every Rad Power owner eventually faces is the same: factory battery pricing. Rad Power sells replacement batteries at premium prices with long lead times. Third-party aftermarket options exist but navigating compatibility claims is tricky. The DICHOU 48V 20Ah battery specifically targets Rad Power models: RadExpand 5, RadExpand Plus, Radwagon 4, Radwagon 5, RadRunner 2, and RadCity. At 960 watt-hours with 500W to 1500W motor compatibility, this is a high-capacity aftermarket option for riders who need more capacity than the factory battery delivers or want a backup pack for longer rides.
Early Amazon reviewers give this a 4.1-star average. Here's what you need to know about aftermarket Rad Power battery compatibility and what this pack actually delivers.
Rad Power Compatibility: What It Means and What to Verify
Rad Power batteries use a specific connector and mounting system. The models listed (RadExpand 5, RadExpand Plus, Radwagon 4, Radwagon 5, RadRunner 2, RadCity) are all 48V bikes, which matches this battery's voltage. The "compatible with" claim on third-party Rad Power batteries means the seller has designed the connector and mounting to match Rad Power's battery interface.
Before ordering any third-party Rad Power replacement, verify:
- Your specific Rad Power model is in the compatibility list (not all Rad Power models use the same battery interface)
- The connector type matches your bike's battery socket
- The battery dimensions fit the specific battery compartment or mounting point on your model
Different Rad Power models may have different battery mounting systems. The RadExpand and Radwagon series use different frame geometries. Confirm with the seller that your exact model and year are compatible before committing.
960Wh: More Than the Stock Battery
Most Rad Power bikes ship with 672Wh (14Ah) to 792Wh (16.5Ah) factory batteries. The DICHOU 48V 20Ah delivers 960Wh, which is 20 to 40 percent more capacity than the factory battery. For Rad Power riders who consistently hit the limits of their factory range, a higher-capacity aftermarket pack extends that range meaningfully.
At 960Wh versus the factory 672Wh, you're looking at roughly 5 to 10 additional miles of real-world range depending on how you ride. On a Radwagon 4 carrying cargo, where range anxiety is real due to the load, that extra capacity is particularly useful.
Motor Compatibility and BMS
The 500W to 1500W motor compatibility covers the Rad Power motor range, which concentrates in the 500W to 750W hub motor class. The BMS is sized appropriately for these motors with overhead for the occasional higher-power demand that cargo riding or steep climbing creates.
Cell quality claims on the listing mention grade-A cells. This is a less specific claim than naming a cell manufacturer (LG, Samsung, Panasonic), but it's an indicator that the manufacturer is aware of the quality concern that drives buyers to look for cell transparency.
What Amazon Reviewers Say
4.1 stars on a limited review count is in the acceptable range for a specialized aftermarket replacement pack. Rad Power replacement battery buyers tend to have specific compatibility concerns going in, and the reviews reflect this: buyers who confirmed compatibility before ordering and found the pack working with their specific model are the source of positive reviews. Lower ratings come primarily from compatibility issues with models not in the list or connector mismatches.
A few reviewers comment on the capacity increase from the factory battery being noticeable in daily range, which is the primary value proposition here.
Rad Power riders who use their bikes for grocery runs, light cargo, or longer recreational rides tend to notice the capacity increase most. The difference between 672Wh and 960Wh shows up clearly on routes that previously left riders running low near the end. Riders whose routes fall well within the factory battery's range may find the upgrade less meaningful. The clearest use case is any rider who has already experienced their factory battery running low before completing their regular route.
Check current pricing and the full review count on Amazon for updated compatibility information since Rad Power model lines evolve.
Who Should Buy This
The DICHOU 48V 20Ah is for Rad Power bike owners with one of the listed compatible models (RadExpand 5, RadExpand Plus, Radwagon 4, Radwagon 5, RadRunner 2, RadCity) who want more capacity than the factory battery provides or need an aftermarket replacement at a lower cost than Rad Power's official parts. The 960Wh capacity is 20 to 40 percent higher than typical factory Rad Power batteries, which translates to meaningful range improvements on the same bike.
For Rad Power models not in the compatibility list, this pack may not be compatible. Contact the seller with your specific model and year before ordering. For non-Rad Power builds with similar specs, compare options in the battery comparison table.
Browse Rad Power compatible ebike batteries on Amazon to compare current aftermarket options. More compatibility-specific reviews are in the ebike battery reviews section.
Frequently Asked Questions
Which Rad Power models is this compatible with? The listing specifies RadExpand 5, RadExpand Plus, Radwagon 4, Radwagon 5, RadRunner 2, and RadCity. Verify your specific model and year against this list. Rad Power has multiple generations of each model, and compatibility can vary between model years. Contact the seller with your exact bike if you're unsure.
Is a third-party battery safe on a Rad Power bike? Third-party batteries work with Rad Power bikes that accept standard battery connections. The main risks are compatibility mismatches (wrong connector or dimensions) and cell quality. A 48V third-party pack at the same voltage as your factory battery is electrically compatible as long as the BMS and connector match. Cell quality is harder to verify without named cell specifications.
Does 960Wh improve range on a Radwagon 4? Yes. The Radwagon 4 ships with a factory battery at lower capacity. 960Wh versus the factory 672Wh or 792Wh gives you 20 to 40 percent more capacity. For a cargo bike that regularly carries loads, that extra range buffer is genuinely useful and extends the practical distance for grocery runs and similar use cases.
Will Rad Power's warranty be affected by using a third-party battery? Using a non-Rad-Power battery may affect the warranty claim if a battery-related issue occurs. Rad Power's warranty terms specify their own batteries. If your bike is still under warranty, review the terms before installing third-party batteries. Out-of-warranty bikes have no restriction.
What's the connector type? The connector is designed to match the Rad Power battery interface for the listed compatible models. Confirm the specific connector implementation with the seller before ordering, particularly if your model year differs from those explicitly listed.
Is this a good backup battery for longer rides? Yes, if your Rad Power model is in the compatibility list. A second 960Wh pack used as a backup doubles effective range for long rides or all-day use. Swap the pack when the first one is depleted and continue riding. This is a common approach for Rad Power riders doing longer tours or delivery runs.