The TB40 lithium-ion aircraft battery is configurable to meet the needs of each specific aircraft, including charge current limit, end-of-life capacity, minimum dispatch capacity and engine-start readiness. The intelligent battery systems communicate real-time, reliable and accurate state of charge and state of health. The TB40 weighs up to 60% less, and delivers more amps per pound, than any other battery. This translates into more power for engine starts, more energy for emergency and back-up power, ultra-fast recharge and much longer life.
- 40 amp-hour battery at 23ºC, nominal
- Lighter than lead-acid and nickel-cadmium alternatives — only 38.5 lb
- Advanced NanoPhosphate® lithium-ion cell chemistry
- Superior performance at extreme temperatures (-40°C to 70°C)
- Overcharge, over-discharge, over-current, short circuit, over-temperature, under-temperature and charge current limiting protection
- Built-in Test (BIT) Indicator communicates real-time state-of-charge and state-of-health
- Higher voltage during engine start — Less wear, less maintenance and increased useful life
- On-condition maintenance
Product Codes | |
|---|---|
| Mfr Part No: | 6430040-1 |
| TSO: | C179b |
Hazmat charges may apply
Weight: 38.5 lbDimensions: 9.1" L x 14.7" W x 8.8" HCharge voltage: 28 VDC nominalOutput voltage: 26.4 VDCOutput current: 1120A continuous, 1500A maxTechnology: Advanced NanoPhosphate® lithium-ion cell chemistryEnergy density: 60.5 Wh/KgCharge current limiting: Programmable up to 4C or 10C unlimitedOperating temperature: -40°C to +70°C (-40°F to +158°F)Configuration: 16P8S; 4 parallel x 8 in series x 4Life expectancy: 8 years (average)Case: Anodized aluminum, blue
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: 6430040-1
Aircraft Fitment Finder
Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
