TYKOOL LFP20L-BS-PRO Lithium Motorcycle Battery, Replaces GYZ20L GYZ20HL YTX20HL-BS, 600CCA 12Ah Fits for Harley Road Glide Street Glide Softail,Sea-Doo 1500cc GT Series Yamaha 1800cc, Digital Readout

1 year later - Works fantastic! Installed on a 2015 Harley Davidson XG750 that eats conventional batteries for breakfast. No signs of swelling or charge degradation. This battery was slightly larger than the OEM battery making the fitment very close, but it will work. Additional consideration is that this battery is much lighter weight than conventional replacements. This battery is compatible with the OEM Harley trickle charger. Just make sure you use the Lithium - ion setting. Great battery, Strong/robust crank, just tight fitment on my particular bike. Buy Lithium if you are tired of your bike eating batteries!

So small and light but stays charged all the time.

Put this in my 1979 FXS shovelhead 93" stroker with 9-1 compression. I have a 1.6kw high torque starter. Starts the bike perfectly and is holding a charge well. 4lbs of incredible is what I've started to call this battery. Time will tell if it lasts but so far I am very impressed. Fit well too. Edit: 7/14/25...battery stops making power after 5 minutes of the bike running and kills the bike. The battery self test stops reading any voltage or percentage of charge left. 15-20 minutes later the battery comes back to life and reads 100% charge. Bike charging system checks out perfect so it must be internally shorting? Guess I'm going back to an AGM battery.

So far, great batteries! Got 2 for pro r, could of probably could of just got 1! Started up great with just 1 but bought 2 so finished installing both.

Installed into a HD Sportster XL1200. Same size as the lead/acid replacement but obviously many more cranking amps. Bike turns over more vigorously compared to a normal lead/acid battery. Only one year warranty; but competing brand almost twice as expensive. Figured I would give it a try. Neat battery power indicator on top of the battery, but inaccessible after installed. Don’t understand how that is a selling point or advantage on a power sport application. One would have to remove the battery to use the built in gauge. Will update later on any integrity issues. Too new to evaluate at the present time.

Put this in my side by side. I use the side by side almost daily, for the winter I have a heater and a plow, never gives me any problems using both at the same time

put in bike started nice .didnt ride .charging good.syartrd week later .great..didnt start for month..batt gone .nothing.wont charge on charger..junk .update..update ...contacted seler.. full replacement batt on its way..awsum ..thay are taking care of me..awsum customer service..thnk u so much.alot good comments bout ther batt..mine was one bad bug..thnks so much

The battery works great. More cranking amps than lead acid batteries and much lighter. Perfect replacement fit even though Amazon said it would not fit my bike. Decided to buy anyway based on battery description and measurements.

It’s the perfect battery I wanted for my motorcycle

Seadoo with about 10 hrs on it dies. Flashing dash lights. Dead in the water. Called service and they indicated I had a dead cell in the battery. Battery was carefully stored and ran well this season until... . Services says "don't worry, we have 145 batteries in stock at over $300. each. Junk batteries that don't last a season for $300 bucks? Hmmm. Anyhow, dropped this much lighter and (hopefully) longer lived LION in and started right up no issues. Still not clear on how this will charge with the seadoo charging system but ordered an external charged made for this type of battery. Time will tell but clearly the garbage they are shipping these marine units with is not worth replacing with the same junk

I bought the LFP20-BS-PRO to replace the corresponding gel battery in an ATV. The lithium battery is more expensive, but I was hoping that the extra cost would be worth it. I charged and discharged the battery with appropriate test equipment and also used it for a number of ATV trips. Here is what I found: As spec’s, the lithium battery has about half the amp-hours of the lead-acid battery. This is usually, since the theory is that the lithium battery can be more deeply discharged. In my tests, charging to full, and discharging to 11 volts, the TYKOOL tested to 11.7 amp-hours. Reasonably close. The nice thing about lithium is that is will accept a large charge current until almost full. This was the case with this battery, taking 4 amps until the battery was well above 90%. One of my biggest complaints about the TYKOOL is the battery capacity display. If you push the test button on the battery, it shows the voltage and % capacity. This info is misleading. When charging, the capacity display goes to 100% in a very short time - even when the total charge amp-hours were about 25%. It would appear that the display is really only good for showing how much energy is left when discharging. If you go by the display for charging, you will not fully charge the battery. I was concerned that the temperature spec for the battery shows that the charging temperature needs to be above -10C. This is usually for lithium, since low temperature charging will destroy the battery. From the spec, there is an internal BMS which manages this. I used the battery in an ATV in temperatures that were around -10C and everything worked well. I did a few charge/discharge cycles on the lab-bench after the real-world test, and the battery still showed the same capacity. The battery is spec’s for operating down to -20C and is advertised to be useable for snowmobiles. Not sure about this one. I use my sled down to -40C, so I don’t think I’m ready to experiment in this area! The manual says that “moisture and liquids can damage this product,” yet it is spec’s for IP66. I hope the IP66 is the true spec, since almost any recreational vehicle is going to be exposed to moisture. Conclusion: My lab bench tests and real-world tests show that the TYKOOL seems to be a good replacement for lead-acid batteries. The charge meter is misleading, but you probably won’t see this anyway once installed - but this is one of the reasons for taking off one star. Using this product in a snowmobile will definitely take it outside of its stated limits, so all bets are off - and for now, I’ll stick with lead acid. Hope this info helps the next guy.

It's a battery, it does what it's supposed to do but the company's support is INCREDIBLE!!! I had an issue where leaving the key on for 5 min would drain the battery and it would shut down. I reached out to support not sure what was wrong, they responded super fast and together we discovered it was my charger (you need a LIFEPo4 14.4V specific charger, mine was only 12V which did not fully charge it) I had a lovely exchange of emails with Amy on their support team who took the time to work with me to find a suitable charger while consulting their engineers for advice to my specific situation. They took the time to educate me and I appreciated that. I couldn't be happier with the battery and knowing that it comes with great support, if i need another i will not hesitate to support this company!

replace your oem HD battery with this one.my bike fires up no problem with the extra cca .Really like the the screen for battery charge,only wish it came with an app ,once the seat it on you can't read the screen lol,slight design flaw mho. But so far ,fingers crossed works great.