The UAZ 36V 10.4Ah 5-Pin is available with both 4-pin and 5-pin discharge connectors under separate listings, and this is the 5-pin version. The only major difference is the connector: the 4-pin and 5-pin versions work with different sets of ebike controllers, so the version you need depends entirely on your controller's plug type. UAZ claims a 24-hour response time if you have compatibility questions.
You also get an XT60 output, a 30A BMS, the Hailong form factor, and a 42V 2A charger. The package includes the mounting plate and two keys, so it comes ready to install. This product listing shares its review pool across all UAZ battery variants (36V, 48V, 52V in various capacities) so the 3.6 star average across 7 reviews reflects experiences with different battery configurations, not just this specific 36V 10.4Ah 5-pin model. That's something to keep in mind when reading the reviews.
Specs and Value
The UAZ 36V 10.4Ah puts out 374.4Wh of stored energy (though the product images round this to 360Wh). For a 36V battery that's pretty solid middle ground that works well for daily commuting and shorter recreational rides. The battery weighs 8.26 pounds according to the listing, which lines up with a Hailong pack with integrated lock and USB functionality. The price per watt-hour is competitive amongst 36V packs, which you can see for yourself on our comparison table.
Physical specs
Rough dimensions are 14.47 x 3.74 x 3.5 inches based on the photos. Black plastic housing slides over a metal mounting plate, with bolts attaching the plate to your bike's downtube. The plate is 13.58 inches long with slotted holes spaced 1.45 inches apart, so there is some room for adjustment depending on your frame. On top, there are four LEDs for showing remaining charge, and a key slot for the lock.
You get a 42V 2A charger, which is correct for a 10S 36V lithium-ion pack, and takes about 5 hours to fully charge the battery. That's a standard charge time for a 10Ah-class battery. You also get two keys and some screws for mounting. USB output for charging other devices is 5V 1A. That'll slowly charge a phone during a ride but not much else.
BMS and motor range
The BMS is 30A providing continuous discharge protection, which at 36V is about 1080W theoretical output. That's comfortable headroom for up to 1000W motors under normal riding. It has all standard protections: short circuit, over temperature, over current, over voltage, and overcharge. UAZ calls this a "Smart BMS," which is a bit of a buzzword rather than a technical feature, but all of the protections are real and expected for any battery with active management.
They don't tell you the cell brand or configuration, which is quite common with budget Hailong systems. UAZ does claim more than 1,500 cycles, although that sounds optimistic, especially since it's a number that applies more to LiFePO4 rather than standard lithium-ion cells. Without knowing what cells are in the pack, a more conservative estimate of 800 to 1000 cycles is closer to reality, but that still means years of daily use before meaningful capacity loss.
Form Factor and Compatibility
Hailong is one of the most popular battery pack shapes in the ebike world. To mount, a metal plate is bolted onto the downtube, and the battery slides onto the plate. All you do is mount the plate, slide the battery on from above, and lock into place with the key. The mounting plate has slotted holes to help center the battery and provide clearance around water bottle bosses and other frame mounted hardware.
The major difference between this one and the four-pin version from UAZ is the 5-pin discharge connector. Both also have an XT60 as a secondary connection option. The 5-pin connector is used on certain 36V controllers, and not all 5-pin plugs are wired up the same way. Check the product images very carefully to compare the connector layout to your own before ordering, or check with UAZ that it works with the wiring you have.
The key lock is both security and a method of removing the battery for indoor charging. UAZ mentions water resistant sealing in the listing which should handle rain and splashing, but no Hailong battery should be soaked in water or pressure washed.
Real-World Range
UAZ claims the battery is good for 20 to 35 miles per charge in moderate conditions. On a 250W to 500W motor with moderate pedal assist on flat ground, 20 to 30 miles is about right for 374Wh of capacity. On a 750W or 1000W motor using heavy throttle up hills, the range drops to around 10 to 18 miles. The capacity should be enough for 5 to 12 mile each way round trips depending on terrain and riding style.
The five hour charge time is fine for overnight charging or topping off during a workday. Check our comparison table to see what this battery costs per watt-hour against other 36V options.
What Amazon Reviewers Are Saying
The UAZ 36V 10.4Ah 5-Pin listing shares its reviews across all UAZ battery variants, so the 3.6 out of 5 star average across 7 reviews includes feedback from buyers of different voltage and capacity configurations. Amazon listings for products that come in several different configurations often pool them all together, and not every review applies to this specific model.
Among the reviews that appear to be for 36V models, one buyer gave it 5 stars and said it was "a perfect secondary e-bike battery, exactly what I wanted." Another brief 5-star review just says "works well." A 3-star reviewer who bought the 20Ah 36V variant says it wasn't worth the price, that the range was only marginally better than the 10Ah battery that came with their bike, and that it didn't perform well in the cold. That cold weather comment is relevant for any lithium-ion battery, as capacity drops off considerably in low temperatures regardless of manufacturer.
On the negative side, a 1-star Spanish-language review mentions that the battery stopped working in a week and couldn't be returned because the buyer had thrown away the box. Two of the 5-star reviews refer specifically to the 52V 20Ah variant, and are from a food delivery rider and a long-commute rider both praising the battery's all-day range, though those apply to a different configuration than this specific 36V 10.4Ah model.
The same pool of reviews makes it a bit harder to get a read on this one specifically, but the general vibe about UAZ batteries is mostly positive. Compare the UAZ 36V 10.4Ah 5-Pin against other batteries on our battery comparison table.
Who Should Buy This
The UAZ 36V 10.4Ah 5-Pin is for riders who need a Hailong replacement battery with a 5-pin discharge connector for their 36V ebike system. If your controller uses a 4-pin connector instead, UAZ sells the same battery in a 4-pin version. The 374.4Wh capacity is a practical mid-range amount for commuting and recreational rides, the 30A BMS supports motors of up to 1000W, and the complete kit with charger, mounting plate and keys means you have nothing else to buy.
The mixed reviews across variants are a concern, especially the report of a battery that failed after one week. UAZ provides a 3-month replacement warranty, plus 12 months technical support, so you have protection if you get a defective item. If the 5-pin connector suits your setup, and the Hailong form factor fits your frame, the UAZ 36V 10.4Ah 5-Pin is reasonably priced at its per watt-hour cost. Check our comparison table for the bigger picture.
Frequently Asked Questions
What is the difference between the UAZ 4-pin and 5-pin batteries? The only distinction is the discharge connector. The 4-pin (B0FXPYZ2HV) and 5-pin (B0FX3LTWCB) versions are otherwise identical in capacity, BMS, form factor, and features, and both include an XT60 output as a secondary connection option. Choose whichever matches your controller.
What charger comes with the UAZ 36V 10.4Ah 5-Pin? This battery includes a 42V 2A charger, which is the correct voltage for a 10S 36V lithium-ion pack. It takes about 5 hours to charge fully from empty.
Does the UAZ 36V 10.4Ah 5-Pin have a USB port? Yes, this battery has a built-in USB output rated at 5V 1A. This is sufficient to charge a phone slowly during a ride but not powerful enough for fast charging or tablets.
Are the reviews on this listing actually for this battery? The reviews are shared across all UAZ battery variants, including 36V, 48V, and 52V models in various capacities. Reviews mentioning "52V20Ah" or "20 amp hour" are for different configurations, not the 36V 10.4Ah 5-pin specifically.
How does the UAZ 36V 10.4Ah perform in cold weather? One reviewer said these batteries do not perform well once the temperature drops. This is a characteristic of all lithium-ion batteries, not just UAZ. All lithium packs lose capacity in cold temperatures, so storing or charging the battery at room temperature before riding helps maintain range.
What warranty does the UAZ 36V 10.4Ah 5-Pin come with? UAZ includes a 3-month replacement warranty and 12 months technical support. Test your battery soon after you receive it to stay within the return and replacement window.