Replacement batteries for folding ebikes are a measuring exercise before they are a shopping decision. The DGLQDC 48V 10.4Ah folding ebike battery is a built-in style pack aimed at bikes like the Samebike LO26, Fiido M1 Pro, and the DCH 006 frame family. The cells and the 30A board are reasonable for the money. The part that will decide whether you keep it or return it is 430 by 100 by 42 millimeters.
Get the Dimensions Right or Nothing Else Matters
This pack measures 16.9 x 3.93 x 1.69 inches and slides inside the frame rather than clamping to the outside of the downtube. In-frame packs have zero tolerance for error. An external Hailong case that is slightly long can still be forced onto the rail with a shim. A pack that is three millimeters too tall for the frame cavity simply does not go in, and now you are photographing a battery for a return.
The seller says it flat out in the listing, twice, which I read as a company that has processed a lot of returns from people who guessed. Pull your original pack, put a tape measure on it, and confirm all three numbers. Confirm the discharge port is 5-pin while you have it out.
The listing names DCH 006 as the target appearance, with a black top cover, and calls out eLectric XP, Samebike LO26, 20LVXD30, XWLX09, and the Fiido M1 Pro as examples. Note that it specifically excludes the plain M1. That level of detail is a good sign, because vague sellers just write "fits most ebikes" and let you sort it out. Compatibility here is about the physical shell and the port, not about the brand badge on your frame.
Capacity, Cells, and What 500Wh Gets You
Ten point four amp-hours at 48V works out to about 500 watt-hours. On a folding commuter with a 500W hub motor, that is a genuine 20 to 30 mile range if you pedal, and closer to 15 if you ride the throttle like a scooter. The seller lists "real high-label capacity," which is their way of pushing back on the common complaint that budget packs test well below their sticker.
The cells are 18650 lithium ion, which is the older and larger format compared to the 21700 cells appearing in newer packs. That is not a problem. The 18650 is the most mature cell format in the industry, the supply chain is enormous, and for a modest 10.4Ah pack there is no meaningful downside. No cell manufacturer is named, so I can't tell you whether these are top-bin cells or B-grade, and neither can anyone else who has not opened one.
The 30A BMS is matched to the pack's stated 800W maximum motor power. That pairing is sensible rather than exciting. If you have quietly upgraded your folding bike to a 1000W motor and a 25A controller, this pack will be working close to its ceiling, and you should expect the protection board to intervene on hard climbs. For a stock 350W to 500W folder it has plenty of margin.
The Key Switch Nobody Reads About
The safety lock doubles as the power switch, and this catches people out. You install the pack, connect everything, press the display power button, and nothing happens because the key is not turned. The listing is explicit that you must rotate the key for the battery to work and leave it in position while riding.
It works fine once you know. The real world consequence is that you now have a small key living in the side of your frame on every ride, and small keys parked in vibrating metal tubes go missing. Buy a spare keyring, keep the second key at home, and do not learn this lesson in a parking lot four miles from your house. That is a cheap habit that saves an expensive tow.
Installation itself is not difficult. Slide the pack in, seat the 5-pin connector, turn the key, done. Anyone comfortable changing a tube can handle it in ten minutes. Our comparison table shows how the capacity here lines up against larger downtube options if you are still deciding on a format.
Who This Pack Suits
The natural buyer is somebody whose two-year-old folding ebike has lost half its range and who does not want to buy a new bike over a battery. If your original pack matches the dimensions and port, this is a straightforward capacity restore at a fraction of what the original manufacturer charges for a replacement.
It is the wrong pack for anyone building a high-power conversion, anyone with a downtube-mounted external case, and anyone who is not going to measure first. The seller's own listing tells you to compare carefully, and ignoring that instruction is the single most common way this purchase goes wrong. If you want the broader landscape before committing, our hands-on reviews cover other capacity options.
You can check current price on Amazon and compare it against what your bike's manufacturer wants for an original replacement. In most cases the gap is large enough to make the measuring effort worth it.
Frequently Asked Questions
How do I know if this fits my folding ebike?
Remove your existing battery and measure it. You need 430 x 100 x 42 millimeters, a 5-pin discharge port, and the same general shell appearance with a black top cover. If any of those three do not match, this is not your pack, regardless of what brand your bike is.
What range should I expect?
Roughly 20 to 30 miles with pedal assist on a 500W folder, and less if you use throttle heavily or ride hilly terrain. Rider weight, tire pressure, and cold weather all pull that number down. Cold is the biggest single factor, and a winter commute can cost you a quarter of your usable range.
Can I run this on a 1000W motor?
The listing caps compatible motor power at 800W, and the 30A BMS backs that up. A 1000W setup will run, but you will be operating near the protection threshold and risking cutouts under load. Pushing a pack past its BMS rating shortens its life and leaves you stranded at the worst moment.
Why won't the battery turn on after installation?
Almost always the key. The safety lock is also the power switch, so the pack stays dead until you rotate the key to the on position. Check that before you start pulling connectors apart.
Are 18650 cells outdated?
No. They are an older format than 21700 cells, but they are proven, widely available, and perfectly appropriate for a pack this size. The format matters far less than the quality of the individual cells, and that is the part this listing does not disclose.
What happens if it arrives and does not fit?
The seller directs you to "Get help with order" on the order page for a return or exchange, and specifically names size problems, not charging, and not working as covered cases. That is a better-than-average return statement for a budget battery, though I can't personally vouch for how the process goes in practice.
A sensible, correctly specified replacement pack for in-frame folding ebikes, with a 30A board matched properly to its 800W motor ceiling. The cells are undisclosed and the key-as-switch design will annoy you at least once. Get the tape measure out first and this is an easy way to give an aging folder its range back.