If you're converting a bike or looking for a range upgrade, the EXECYC 48V 25Ah ebike battery packs some serious capacity into a compact water bottle style case. With 1200 watt-hours on tap and LG 21700 cells inside, this EXECYC 48V 25Ah ebike battery on Amazon is aimed at riders who want real range without stepping up to a bulky triangle pack.
Specs and Build Quality
This is a 48-volt pack with a claimed 25 amp-hours, which works out to a solid 1200Wh. That's enough to push a 750W hub motor for a good while, or let a 500W commuter chew through miles without worrying about the next charge.
The internals are LG 21700 cells, which is a good sign. Not all budget batteries use name-brand cells, so seeing LG inside is a nice touch. EXECYC says the pack can handle over 1000 charge cycles before seeing meaningful degradation, and the batteries should hold at least 80% capacity after 800 cycles. Lithium enthusiasts know cell quality matters more than almost any other spec, and LG 21700s are known for decent cycle life and consistent discharge.
On the outside, the case measures roughly 368 by 96 by 155 millimeters and weighs around 6 kilograms (about 13.2 pounds). That's not ultralight, but for 1200Wh it's pretty reasonable. The form factor is a water bottle style pack, sometimes called a Hailong or downtube battery, that mounts to a standard bottle cage bracket. It uses a 5-pin base that's already installed at the bottom of the battery, making setup pretty straightforward with compatible controllers.
BMS, Safety, and Design Features
The battery comes with a 50A smart BMS, which is more than you'll need for most setups. A 50A BMS can handle continuous output up to around 2400 watts at 48 volts, so even a 1500W motor won't push it to the limit. The BMS provides over-voltage, under-voltage, short circuit, and over-current protection, plus active cell balancing to keep the pack healthy over time.
EXECYC also mentions UL2271 certification through SGS, which is basically the gold standard for ebike battery safety certs. If you're nervous about lithium battery fires, UL2271 means the pack passed rigorous testing for overcharge, short circuit, and thermal runaway scenarios.
The pack also has a built-in power switch to cut parasitic drain when the battery's sitting idle, plus an LED power indicator for checking remaining charge at a glance. There's an anti-theft key lock too, which helps prevent someone from walking off with your battery while your bike's parked.
What Amazon Reviewers Are Saying
The EXECYC 48V 25Ah has around 13 reviews averaging 4.0 out of 5 stars, so most customers are pretty satisfied. What stands out is the quality of the feedback, with some long-term users reporting years of solid performance.
One reviewer with serious mileage wrote about using UPP brand batteries (same manufacturer behind this EXECYC pack) for over 35,000 miles across multiple packs. They mentioned the first battery was over 2.5 years old and still pulling strong with minimal degradation. That kind of real-world track record counts for a lot, since dead batteries after 6 months is a common complaint on budget packs.
The same reviewer also gave props to the customer service, saying they got a return authorization quickly when they ordered the wrong voltage and needed to swap. Good support isn't something you always get with off-brand Amazon batteries, so that's worth noting.
A few users mention the pack works well with Bafang mid-drive conversion kits, which is one of the most popular motor choices for DIY ebike builds. The 5-pin connector and XT60 discharge cables match up nicely with those kits.
Range and Real-World Performance
At 1200Wh, this battery should give you some serious range depending on your setup. Here's a rough idea of what to expect:
- 500W motor, mild pedal assist: Probably looking at 40 to 55 miles depending on terrain and rider weight
- 750W motor, mixed throttle and assist: More like 25 to 35 miles
- 1000W to 1500W motor, heavy throttle: Expect 15 to 25 miles of hard riding
Those are estimates based on typical consumption. Your actual mileage will vary based on tire pressure, hills, wind, and how heavy your right hand is. But the point is, 1200Wh gives you options. You're not constantly hunting for the nearest outlet.
The battery uses XT60 discharge connectors, both male and female included, which is standard for higher-power ebike builds. XT60s handle up to 60 amps continuous, so they're well matched to the 50A BMS. The pack is compatible with 48V and 52V controllers, so there's some flexibility on the voltage side.
Who Is This Battery For?
This EXECYC pack is a solid pick if you're building or upgrading a mid-power ebike and want LG cells without paying premium brand prices. The 1200Wh capacity works well for long commutes, weekend adventure rides, or anyone who hates range anxiety.
It's especially good for Bafang conversion builds since the 5-pin base and XT60 connectors match up with those kits nicely. If you're running a 750W or 1000W motor and want enough range for a full day of mixed riding, this is worth a look.
A couple of things to keep in mind though. The listing title says 25Ah but some product page variants show 20Ah, so verify the capacity when you order. The pack works with both 48V and 52V controllers, but double-check your controller's voltage range first. And since this is a generic water bottle style pack, it won't drop into a branded ebike tray like Rad Power or Aventon. Check your mounting setup before buying.
For more battery comparison options, check out our ebike battery comparison table to see how this pack stacks up against other 48V and 52V options. You can also browse our full list of battery reviews for more in-depth coverage.
Frequently Asked Questions
Does this battery work with my 48V controller?
Yes, this is a 48V nominal pack and works with any 48V controller that accepts a 5-pin connector. It can also handle 52V controllers if your setup supports that range.
What motors are compatible?
The battery supports motors from 250W up to 1500W. The 50A BMS handles the peak draw from a 1500W motor without hitting protection limits. Common pairings include Bafang BBS02, BBSHD, and hub motor kits.
Are these really LG 21700 cells?
According to the manufacturer, yes, the pack uses LG 21700 cells rated for over 1000 deep discharge cycles. Several long-term reviewers confirm getting years of use from these packs.
Does it include a charger?
Check the current listing to confirm whether a charger is included. Some configurations include one, others may not. Best to verify before adding to cart.
What connector does it use?
The battery has a 5-pin base with XT60 discharge cables. If your bike uses a different connector, you may need an adapter or to swap the connector.
How do I mount this on my bike?
The battery uses a standard water bottle cage mount with a 5-pin slide-in base. Make sure your frame has space for the battery dimensions, which are about 368mm long by 96mm wide.
Check current pricing for the EXECYC 48V 25Ah ebike battery on Amazon