The poster presentation focuses on an investigation into the evaluation of batteries for various properties that impact performance and safety. The batteries tested have been sourced from a variety of manufacturers for comparative analysis. The audience will gain knowledge in what potential pitfalls exist within lithium-ion batteries, and what is necessary to identify those, prior to implementation in a product. Data will be presented showing the wide variety in quality of batteries and how different operating conditions impact their performance and lifetime characteristics. Specific topics explored will include battery cell construction, energy capacity, degradation leading to capacity loss, and how quickly end of life is reached.