# Battery Load Testing in Upland > Battery load testing in Upland that shows how your battery holds up under starting current. Route 66 Auto Repair charges first, then tests and explains. Source: https://route66autorepairshop.com/electrical-services/battery-load-testing Updated: 2026-09-17 Business: Route 66 Auto Repair, 1775 W Foothill Blvd, Upland, CA 91786, (909) 608-7699 Hours: Monday to Friday 8 AM–5 PM, Saturday 8 AM–2 PM, Sunday closed **TLDR:** A load test copies **starting current** and measures the **voltage under strain**, which is how a weak battery gives itself away. A battery load test at Route 66 Auto Repair in Upland puts your battery under a heavy draw, much like the starter does, and watches how far the voltage falls. It is the test that catches a battery that reads fine on a meter but fails on a hot afternoon. We charge the battery first, account for temperature, and write the result on your repair order. ## How does a battery load test work? Every battery has a cold cranking amp rating printed on the label. A classic load test draws about half that rating for around fifteen seconds while the tester watches voltage. A healthy battery at room temperature stays above roughly 9.6 volts. One that drops well below has lost too much capacity to be trusted. Electronic testers reach a similar answer a different way, by measuring the battery's internal conductance without a long heavy draw. We use the method that suits the battery and the car, and when an electronic result is borderline, a true load test settles it. ## What makes a load test fair? - The battery is charged first, since a flat battery always fails - Surface charge is removed so the starting voltage is honest - Temperature is considered, because a cold battery reads lower - The rating used is the one on the battery, not a guess - Terminals are clean so the clamp is not the weak link ## Our load test process 1. **Inspect and charge:** We check the case and terminals, then bring the battery to full charge if it is low. 2. **Apply the load:** The tester draws a set current and records the lowest voltage. 3. **Compare and explain:** We compare the result with the rating and tell you plainly if the battery passed, is marginal or failed. ## What's included in a load test - Battery charge check and charging if needed - Load or conductance test against the battery's rating - Lowest voltage and pass or fail written on the repair order - Terminal condition check - A charging output reading so the car is not overlooked ## Why a passing battery can still fail in July Heat makes a battery look stronger on the day and wears it faster over the season. That is why a marginal result in spring deserves a plan. If you just want a quick read, [battery testing](https://route66autorepairshop.com/electrical-services/battery-testing) covers the everyday check, and a [battery voltage test](https://route66autorepairshop.com/electrical-services/battery-voltage-testing) is the simplest first look. A failed battery leads to [battery replacement](https://route66autorepairshop.com/electrical-services/battery-replacement). ## What the result means **Need now:** - Voltage falls well below the pass line - The battery will not accept a charge **Need later:** - A pass that sits close to the line on an older battery - A pass with light terminal buildup to clean ## How pricing and timing work The test is fast. Charging a deeply flat battery adds time. If the load test is part of a no-start diagnosis, the diagnostic fee is stated at the counter first. AAA members get 10% off approved parts and labor, up to $75. ## Aftercare Keep the number. Retesting before and after summer shows the trend better than any single result. ## Frequently asked questions ### Can a parts store test give the same answer? Many stores use electronic testers that work well on a charged battery. Results on a flat or hot battery can mislead. We charge first and check the car's charging side too. ### Does the load test hurt the battery? No. It is a short draw, similar to a hard start. A healthy battery recovers right away. ### What if my battery passes but the car still cranks slowly? Then the problem is likely a cable, a ground or the starter. We move on to voltage drop testing during cranking. --- Call (909) 608-7699 or visit https://route66autorepairshop.com/contact for a written estimate.