Our Methodology
What we look for
Every product we cover goes through the same process. No review is published until we have spent meaningful time with the device — charging it, draining it, breaking it in, and comparing it against the alternatives you are actually choosing between.
We have no affiliate relationship with any manufacturer we review. We do not accept review units with embargo conditions tied to scores. If we received a product for free, we say so. Our only interest is giving you an accurate picture so you can spend your money well.
Who writes these reviews
Battery Lab was founded by engineers and longtime electronics enthusiasts who were frustrated by the gap between press-release reviews and real-world performance. Our reviewers have backgrounds in electrical engineering, consumer electronics repair, and technical journalism. We bring instruments — not just opinions — to every evaluation.
The six things we always measure
These criteria apply to every review we publish. Scores are weighted by category — a laptop review weights battery life differently than a review of a portable charger.
Real-World Battery Life
Manufacturer specs are measured in lab conditions that rarely match everyday use. We run devices through actual usage scenarios — streaming, browsing, gaming, standby — and log discharge curves over multiple charge cycles to give you a number that reflects how a device actually behaves in your hands.
Charging Speed & Heat
We measure wall-to-full charge times with calibrated USB power meters, and monitor surface temperatures throughout. A fast charger that runs hot enough to degrade a battery over time is not a feature — it is a liability. We flag both.
Long-Term Durability
We do not publish first-impressions as reviews. We use products for a minimum of two weeks before scoring, and return to high-use items after 90 days to note any changes in performance, software, or build quality. What holds up — and what does not — gets reported.
Build Quality & Repairability
We examine physical construction, port placement, and materials. We also note iFixit repairability scores and flag devices where common repairs — battery replacements, screen swaps — are unnecessarily difficult or void the warranty.
Software & Support Longevity
Hardware is only as good as the software running it. We document the manufacturer's update track record, the promised support window, and any history of features being removed post-launch. A device sold today that gets two years of security patches is a worse value than one that gets five.
Value in Context
Price matters, but we evaluate value relative to the competition at the same price point — not in isolation. A $400 laptop that does 90% of what a $900 laptop does is often the better recommendation. We make those comparisons explicit.
Our commitments
- ✓We disclose when a product was provided for review at no cost.
- ✓We disclose affiliate links. Commissions never influence scores or recommendations.
- ✓We correct factual errors promptly and note the correction at the top of the affected article.
- ✓We do not delete negative reviews when a manufacturer releases a follow-up product.
- ✓Scores are reviewed annually against the current competitive landscape.
Have a question about how we tested a specific product?
Every review lists the test conditions used. If something is unclear, reach out — we publish full methodology notes on request.