# Service bulletin TT453

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.

- Type: Service bulletin
- NHTSA id: 10176927
- Published by NHTSA: 2020\-07\-07
- Manufacturer's number: TT453
- Manufacturer's date: 2020\-06\-16
- NHTSA component: EQUIPMENT; ELECTRICAL SYSTEM

## NHTSA's 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10176927-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10176927-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Equipment and accessories

## Vehicles listed

- HARLEY\-DAVIDSON HARLEY\-DAVIDSON

JSON: [/v1/bulletins/10176927](/v1/bulletins/10176927)

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