EV battery check in five minutes: LG Energy Solution’s B.once speeds diagnosis

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• How B.once checks battery condition and performance
  • Two testing modes tailored to different needs
  • What the system measures
• Speed and data power: why this matters for volume testing
• Impact on resale markets and buyer confidence
• How B.once fits into LGES’s BaaS plans
• Proprietary tech and track record behind the product
• Practical use cases for dealers, insurers and fleet managers
• Industry implications and the road ahead

LG Energy Solution has unveiled B.once, a new diagnostic platform designed to read the state of electric vehicle batteries in real time. The tool promises clear, fast battery reports that could change how used EVs are bought, sold, insured, and serviced.

How B.once checks battery condition and performance

Two testing modes tailored to different needs

B.once runs in two distinct modes to balance speed and depth. Each mode taps into vehicle telemetry and LGES’s battery algorithms.

• Quick Scan: plugs into the car’s diagnostic port and returns a health snapshot within five minutes.
• Power Scan: performs a deeper analysis during a charging session, focused on the 50–80% state-of-charge window and delivers a detailed report in about 30 minutes.

What the system measures

• Battery capacity trends over time.
• Individual cell and pack voltages.
• Temperature behavior under charge and discharge.
• Charge acceptance between specified state-of-charge ranges.

The platform monitors diagnostics through a mobile app. Reports are designed to be readable by dealers, insurers, and consumers alike.

Speed and data power: why this matters for volume testing

B.once is built to scale. Quick Scan helps high-volume outlets vet fleets fast. Power Scan gives underwriters and warranty teams a stronger data basis without long driving histories.

• Quick checks for trade-in lanes and auction houses.
• Deeper validation for warranty claims and insurance policies.
• Real-time results reduce uncertainty for buyers and sellers.

LGES says the service draws on data from over 30,000 electric vehicles to improve accuracy.

Impact on resale markets and buyer confidence

Used EV platforms and dealerships often struggle to give trusted information on battery life. B.once aims to close that gap.

• Consistent, verifiable battery reports could raise buyer trust.
• Dealers can show quantified battery health at point of sale.
• Resale platforms can standardize listings with battery metrics.

One reseller has already committed to deploying B.once at scale starting this month, indicating early market interest.

How B.once fits into LGES’s BaaS plans

The launch expands LG Energy Solution’s Battery-as-a-Service portfolio. The company already offers regular owner diagnostics through its other consumer services.

LGES positions B.once as an enabler for ancillary services such as insurance and financing. The aim is to link battery diagnostics with products that reduce risk for lenders and underwriters.

Proprietary tech and track record behind the product

LG Energy Solution frames B.once as the product of deep battery know-how. The system is backed by a large patent base and field experience.

• More than 10,000 global patents support the firm’s battery management work.
• LGES reports it has supplied over 8 billion battery cells to roughly 15 million electric vehicles since 2009.

Those figures are used to assert reliability and real-world validation of the diagnostic algorithms.

Practical use cases for dealers, insurers and fleet managers

• Pre-sale inspections to certify battery health for listings.
• Warranty triage to determine if battery degradation is covered.
• Fleet maintenance planning using periodic diagnostics.
• Insurance underwriting that uses objective battery metrics.

Reports can be shared digitally, enabling remote review and faster transactions.

Industry implications and the road ahead

The arrival of fast, standardized battery reports points to a broader trend: automotive value chains are moving toward data-driven transparency. If adopted widely, tools like B.once could shift the market from trust-based sales to evidence-based decisions.