Aluminum alloy casing. All Silver Fish batteries are made of plastic. Aluminum will keep heat away from the cells much better than plastic. If you fall on the ground with a plastic battery, it may crack. The aluminum shell on this sdtyyp will survive serious drops. Dimensions are basically 14.5x4.5x3 inch and mount under the rear seat tube using the supplied sliding bracket. Once locked onto the bike using the provided keys, twist the key to the lock position to secure the battery to your frame. Then twist it to the run position to release the battery for charging or storing. Simple yet effective. Check the current price on Amazon. Check the current price on Amazon.
There is a molded handle on top of the battery to help you move it around. There are Four blue LEDs on the left hand side of the case. Pressing the power button will turn them on to display the state of charge. They glow brightly when full, less brightly as they deplete. It is a primitive method of gauging your remaining range prior to heading out.
It has an 18Ah capacity and 48V voltage rating. It has 864Wh of energy (48 * 18 = 864). While not as high as 20+ ah capacity batteries used by long-distance travelers, it is sufficient for most commuter/weekend riders. If you don't require the maximum capacity and want a very reliable aluminum cased battery that provides true water resistance, consider this model.
This article discusses its specifications, design features, BMS protection and what owners with 4.1 stars and 134 reviews have stated regarding its actual performance.
Specs and Build Quality
Sodytp's 48V 18Ah silverfish battery contains 864Wh of energy (48V * 18Ah = 864Wh). That is a lot of capacity for a silverfish battery and puts it smack in the middle of where i'd expect to find most mid-range capacity silverfish batteries. Most Commuters and weekend warriors will have ample capacity with 864Wh and won't have to deal with the additional weight of a 20 + ah pack.
Physical construction
The biggest differentiator here is the aluminum alloy case. Virtually all other silverfish batteries at this capacity use plastic cases. While plastic serves just fine in most respects, aluminum conducts heat way better than plastic, plus it's significantly stronger when handling the battery. If you accidentally drop a plastic case, odds are good it'll crack. The aluminum case on this sodytp can absorb real hits.
Size-wise, it measures roughly 14.5 x 4.5 x 3 inches, which is typical for silverfish-style batteries. The battery installs into the frame via a slide-on mounting bracket that sodytp supplies along with two keys for locking/unlocking the battery to/from your frame. To install the battery, simply insert the battery into the mounting bracket and then twist One of the provided keys to secure it in place. To remove it for charging/storage simply twist the opposite direction.
Portability and convenience
The sodytp has a built-in carry handle molded into the top of the case. As such, this isn't really something i'm going to spend too much time explaining -- however, it is extremely convenient to have when you're lugging a 10-pound pack from your garage to your bike or up/down flights of stairs. A Portability handle is another One of those little things you never give much thought to until you've got a battery without One and are trying to manage a ten-pound pack with both hands.
There are Four blue indicator LEDs located on the case-side panel. Depressing the power switch activates these LEDs, indicating your battery's remaining capacity. In order from brightest to dimmest: Four indicates full, three indicates 75%, etc... Again, it is not the best indicator. However, it gives you a pretty good indication of how far you've got to go before having to recharge your bike.
BMS Safety and Design Features
As mentioned above, this battery utilizes a 25a-30a BMS. Sodytp states that this BMS supports virtually every type/motor from 250W up to 1000W. Using 48V and 30a, we arrive at 1440 watts (theoretical maximum), providing ample overhead for a 1000W motor and plenty of margin for a 750W or 500W motor. The BMS protects against standard forms of abuse: overcharge, under discharge, over currents, short circuits, and temperature extremes.
IP68 waterproof rating
Again, as mentioned above, this is perhaps the largest feature differentiating sodytp from its competitors. Most silverfish batteries at this capacity rate somewhere around ip65. That's essentially "splashing" water resistant. However, sodytp claims that this battery is IP68 compliant (fully dustproof/submersible to depths greater than One-meter). While no ebike battery is completely impervious to damage (no matter what anyone tells you), sodytp's claim of IP68 compliance certainly provides a level of confidence in your ability to ride through prolonged rain showers/puddles/power washing your bike/etc...
That said, please remember that while this battery will withstand submersion to One meter or deeper for extended durations. Prolonged submersion is never recommended. As always with ebikes/batteries, there is always some degree of risk involved.
ON/OFF switch and safety lock
The inclusion of an integrated ON/OFF switch combined with a combination key lock is another great feature that most budget ebike manufacturers either choose to omit entirely or provide as separate components. Once again, this combination switch/key lock keeps you from riding off with the battery disconnected (or) keeps others from powering on your bike while disconnecting your battery.
What Amazon Reviewers Are Saying
The sodytp 48V 18Ah silverfish battery has received 134 reviews on Amazon at 4.1 stars. That is quite a sizable sampling of data to determine what real buyers like you actually believe about this product!
Positive feedback
Many reviewers spoke positively about the overall build-quality of the aluminum alloy case. Many reviewers felt that sodytp constructed their batteries much better than comparable products utilizing plastic casings. One reviewer even praised the aluminum case so highly that he purchased this battery instead of lower-cost alternatives because he liked it so much after six months of ownership.
Multiple reviewers also praised the range offered by this battery as well. Since the sdtyyp 48V 18Ah holds 864Wh of usable energy. Most reviewers estimated that their range varied anywhere from twenty-five to forty-five miles per charge based upon their individual ebike configurations, throttle usage and terrain types. Commuter-type cyclists who travel roughly fifteen miles each-way (ten miles total) reported needing to charge their batteries every two-to-three days.
Several reviewers who commute regularly during wet climate conditions complimented sodytp's claim of IP68 compliance by stating that they've ridden through numerous prolonged rain storms and experienced zero issues with their batteries.
Finally, several reviewers also complemented sodytp's charger as reasonably fast for charging batteries from flat-to-full (typically within a timeframe ranging from Four to six hours).
Negative feedback
Only a handful of reviewers complained about fitment problems with various bicycle frames. While silverfish designs utilize established standards for installing under-seat-tube-mounted batteries. Obviously not all bicycles possess identical-sized openings for installation (regardless of whether or not they are silverfish-compatible). While sodytp has provided detailed dimensional guides for proper installation. As with all purchases, please ensure you accurately measure available space prior to ordering.
A few reviewers commented on the increased weight associated with an eighteen amp-hour battery versus comparably sized ones. The aluminum case weighs substantially more than comparably sized plastic ones. One reviewer claimed that while he noticed the added weight when physically moving the battery. Once installed on his bicycle, he didn't experience any issues related to weight.
A few reviewers also noted stiffness/awkwardness associated with turning their key-lock mechanisms ON/OFF. While not unique to sodytp alone. This is an issue commonly seen among many silverfish models regardless of manufacturer.
Who Is This Battery For?
I would recommend purchasing this battery to any cyclist seeking a durable aluminum alloy-cased ebike battery capable of genuine IP68 water-resistance at competitive pricing. This eighteen amp-hour battery offers ample capacity for commuting/day-tripping/recreational cycling and most other normal ebike applications. Additionally, if you live in a region known for excessive moisture/rainfall/storms/store your bicycle outdoors/etc...then this will definitely be superior to any plastic-cased competitor offering lesser water-resistant ratings.
While this battery supports thirty amps and is suitable for virtually any fifty-volt ebike motor configuration (from 250watts up to 1000 watts). Customers operating a One thousand five hundred watt or higher configuration ebike should opt for a larger amp-hour/higher-current capability ebike battery (with corresponding higher amp-hour capacity). For nearly all cyclists utilizing five hundred watt/eight-hundred watt/One-thousand watt motors. However. This eighteen amp-hour fifty-volt ebike battery will meet virtually all requirements.
Silverfish-shaped batteries demand seats with adequate clearances/seat tube mounts and proper fitting brackets. As such. If you are replacing a pre-existing silverfish-shaped battery. This will generally be a straightforward swap/installation process. If you are transitioning from a non-silverfish shaped ebike. Please verify your existing frame has appropriate mounting areas and compare connectors prior to making your purchase.
If you need max range for extensive touring or require more than thirty amps continuous current flow. Then this larger eighteen amp-hour pack or possibly an even larger seventy-two volt triangle pack would be superior choices. Overall however. For a solid all-purpose mid-capacity aluminum alloy-cased fifty-volt silverfish ebike battery with first-class build quality, sodytp's eighteen amp-hour model represents an excellent value proposition. Compare this model with others in our ebike battery comparisons page for more details on comparisons.
Frequently Asked Questions
how long does the sodytp fifty-volt eighteen-amp hour warranty last?
Typically twelve-month warranties apply to sodytp's fifty-volt ebike batteries (alongside thirty-day return policies). Please confirm warranty specifics for the item being sold (as regional/seller-based variations exist).
what kind of BMS does this battery use?
The sodytp uses a twenty-five/ampere-thirty ampere BMS for protection against overcharge/under discharge/over currents/shut circuits/temp extreme failures etc... This BMS protects against virtually all common failures seen in ebike batteries today.
what real-world range do owners experience?
Actual range depends heavily upon individual factors including: motor size/riding style/terrain ridden/wear weight etc.... Based upon owner reports. Most riders estimate anywhere from twenty-five miles to forty-five miles per charge. Most Commuters averaging ten-mile round trips experience two-to-three-day charge cycles with their bikes equipped with five-hundred watt motors and moderate pedal assistance settings.
will this battery work with my One thousand watt motor?
Yes it will. Sodytp states that this battery works with virtually all fifty-volt motors from two hundred fiftieth watts up to One thousand watts. Given that you're working at forty-eight volts/thirty amperes. You have theoretically up-to fifteen-hundred-two-watt peak output. Giving you more-than-enough head-room for a One thousand watt motor - plus room for a seven-hundred-fifty watt or five-hundred watt motor.
does it include a charger?
Yes. Sodytp includes a fifty-six volt two ampere charger along with required mounting hardware including a slide-on bracket and keys. Typically chargers take Four-to-six hours to complete charging your empty-battery to full-charged status.
how waterproof is IP68?
IP68 represents the absolute highest water-proof rating possible for consumer electronic devices. In essence. An IP68 certified device is not only completely dust-free/water-free-proof. But it can also remain submerged in water exceeding One meter in depth indefinitely - without sustaining any measurable harm whatsoever. In practice terms. If you plan on biking through prolonged rain-showers/puddles/etc.. You can confidently know that your sodytp fifty-volt eighteen-amp hour silverfish ebike battery will perform flawlessly without ever worrying about potential damage caused by water exposure.
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