UL2271 certified batteries from a known brand at under 240 bucks. The DICHOU (UnitPackPower/UPP) 48V 20Ah pack uses claimed LG cells and carries SGS certification, both of which are hard to find at this price point. Most budget 48V batteries skip certification entirely.
UPP is a well-known brand within the ebike battery conversion kit space. They've been selling packs for many years, and are widely recognized by conversion kit builders. This particular downtube pack represents one of their standard configurations, but includes some enhancements beyond typical entry-level options.
Specs and Build Quality
The listed spec for the cell is LG 5000mAh in a 48V 20Ah configuration totaling 960Wh. The case is the standard Hailong-style downtube housing with a five-pin connector base and an XT60 discharge connector for handling the 50A peak current.
As mentioned above, the BMS is the major upgrade for this unit. While many budget options are rated at 30A or 35A, UPP has opted for a 50A BMS. A 50A continuous rating allows the BMS to support a 1500W motor running at maximum power output, plus some headroom. That headroom matters when climbing steep hills or accelerating from a stop, where momentary current draw spikes well above the continuous rating.
The 50A BMS is rare at this price point. Most 48V 20Ah batteries at under 240 dollars come with a 30A or 35A BMS that limits peak draw. With 50A of headroom, the battery won't trip protection on hills or during hard acceleration, which is a real benefit for riders with powerful hub motors or mid-drive setups. It also means the BMS runs cooler under sustained load, which improves long-term reliability.
BMS, Safety, and Design
Again, the UL2271 certification through SGS is important enough to call out. This standard addresses electrical, mechanical, and thermal aspects of safety. Obtaining certification is expensive, so most budget packs simply omit it.
In addition to providing overcharge cutoff, over-discharge cutoff, over-current protection, and short circuit prevention, the BMS also has a 50A continuous rating for sustained high-current draw.
The package comes with a 54.6V 3A charger, which is the proper voltage for charging a 48V (13S) lithium-ion battery. Since it's a 3A charger, a full recharge from empty takes about six to seven hours. Overnight charging is the practical approach. If you want faster charging, a 5A or 8A replacement charger with the same 54.6V profile cuts that time by nearly half.
Cycle life is claimed at 800 to 1000 cycles to 80% capacity. That aligns with what you'd expect from LG cells in this configuration. With typical weekly charging, figure 3 to 5 years of usable life before noticeable capacity loss sets in.
Battery Life and Charging
At 960Wh total capacity, the battery delivers somewhere between 25 and 40 miles depending on assist mode. On a 750W hub motor with moderate pedal assist, expect about 30 to 35 miles. On a 1500W motor running hard, plan for around 20 miles. Temperatures below 50°F will cut into range by about 10 to 15% as lithium-ion chemistry loses efficiency in cold weather.
The XT60 connector is standard for Bafang controllers, which makes this a straightforward drop-in for BBS02 and BBSHD conversion kits. If your controller uses a different connector, you may need an adapter. The 5-pin base connector is UPP-specific rather than generic Hailong, so factor that into mount compatibility.
Who Is This Battery For?
Anyone planning on using this battery with a Bafang conversion kit who wants safety certification is the target demographic. The UL2271 certification through SGS is extremely difficult to obtain at this price.
The single customer review is a concern. Since there are no verified buyer experiences for this specific listing, check your fitment carefully before purchasing. Although UPP is not unknown as a company having sold thousands of units, this particular ASIN is new and unproven in the market.
Compare specs against other 48V options on the ebike battery comparison table before committing. For riders who prefer a battery with more customer feedback, browse our other battery reviews for proven options with verified buyer experiences.
Not ideal for riders who need a battery backed by hundreds of verified reviews. You can check current pricing on Amazon to see if the price has changed since this review was written.
Frequently Asked Questions
Are the cells actually LG?
The listing claims LG 5000mAh cells. Without independent testing or a teardown, take it as a stated spec rather than verified fact. UPP has used LG cells in other batteries, which lends some credibility. If cell brand matters to you, consider buying from a seller who publishes third-party results or teardown photos.
What motors does this battery work with?
The 50A BMS supports motors from 500W up to 1500W. Works with Bafang BBS02, BBSHD, and most hub motor conversion kits. The XT60 connector is standard for Bafang controllers. The 50A rating gives you more headroom than most 48V packs for hard acceleration and steep climbs.
Is this battery compatible with my existing mount?
If you have a standard Hailong downtube mount, yes. UPP batteries typically need the UPP-specific mounting plate, which may differ slightly from generic Hailong mounts. Check your plate pattern before ordering to avoid compatibility surprises. The 5-pin base is different from the standard 3-pin Hailong connector used by many generic batteries.
What's the actual range in miles?
Expect 25 to 40 miles depending on assist level, rider weight, terrain, and temperature. More on flat ground with low assist, less on hills or full throttle. Eco mode stretches it to the higher end. A 960Wh pack on a 750W motor typically delivers 30 to 35 miles of practical range in mixed conditions with pedal assist. Hilly terrain or aggressive throttle use drops that closer to 20 to 25 miles.
Does it come with a warranty?
UPP typically offers a 12-month warranty on their batteries. Check the current listing for exact terms and keep your order receipt. The warranty covers manufacturing defects but not physical damage or improper charging. Most issues are addressed within the first year of ownership if they're going to show up.
How long does the charger take?
The included 54.6V 3A charger takes about 6 to 7 hours for a full charge from empty. A 5A fast charger can cut that to around 4 hours if you need quicker turnaround for multi-day riding. Overnight charging with the included charger is fine for daily commuters. Remove the battery from the charger once it reaches full charge to maximize long-term cell health.