Yuasa YTX20L-BS was original equipment in the 2010 Triumph Thunderbird. After a little over 5 years, it was replaced with same model Yuasa because of its faultless service, and only due to age.
5.5 years later, I purchased another Yuasa from Adept Powersports, this time a YTX20HL-BS which has an extra 40 cold-crank-amps (270 vs 310), a direct replacement in size and terminal location. Being shipped dry gives me the luxury of waiting a bit longer to replace my 2nd aging Yuasa sometime this winter. Yuasa makes a top-quality battery, the only brand I'll buy.