{"nhtsa_id":10176927,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-07-07","date":"2020-06-16","document_id":"TT453","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; ELECTRICAL SYSTEM","mfr_system":null,"summary":"TECHNICAL TIP BULLETIN TT453: BATTERY BEST PRACTICE INFORMATION. PURPOSE. Revision. AGM Batteries: Tech Tip TT453 combines all battery, testing and charging information from Service Bulletins M1089, M1089A, M1290, M1329, M1391, M1404 and M1418 and Tech Tips TT342 and TT440 into one document. This also updates procedures and equipment to maintain, test or charge all Absorbed Glass Mat (AGM) batteries. Li-Ion Batteries: To explain the benefits and clarify the usage of the Lithium LiFe batteries. Updated to add 2 Ampere-hour (Ah) Li-Ion Battery.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10176927-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10176927-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10176927","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HARLEY-DAVIDSON","model":"HARLEY-DAVIDSON","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}