FAQ
Frequently Asked Questions
Your guide to shopping, compatibility, and safe DIY battery building with RenewSpark.
Ordering & Shipping
How fast do you ship?
Most in-stock items are processed within 1–2 business days. You’ll receive an email with tracking as soon as your order ships.
Where do you ship from?
Orders ship from our facility in Southern California. Domestic U.S. orders typically arrive in 3–5 business days depending on distance and carrier speed.
Do you offer returns or exchanges?
Yes. Unused items in original packaging can be returned within 30 days of delivery. Cells or electronic components that have been welded, soldered, or altered are not eligible. Read our full refund policy.
Product Compatibility
Do your cases fit major power tool brands?
Yes — our power tool cases are designed for precise OEM-style fit for popular brands. Always confirm model compatibility in the description before purchase.
How do I choose the right voltage and capacity?
Voltage is determined by the number of series cells (S). Capacity and current handling come from parallel cells (P). Check our Getting Started Guide for an easy breakdown.
Are your connectors standard?
Yes — we carry XT30, XT60, JST-XH, and other common standards used across e-bikes, scooters, and tool packs.
Cells & Materials
Are your lithium-ion cells genuine?
Absolutely. We stock authentic cells from trusted manufacturers such as Samsung and Molicel, with consistent voltage and internal resistance verified on arrival.
What’s the best cell for power tools or e-bikes?
Power tools typically perform best with high-discharge cells (20–30A continuous). E-bikes often benefit from higher-capacity cells with moderate discharge. Always balance runtime and current demand for your setup.
BMS & Protection
How do I pick the right BMS?
Match the BMS to your pack’s series count (S) and select a continuous current rating above your expected draw. Shop BMS & Protection.
Do you offer balance and non-balance options?
Yes — balanced BMS models keep each series group even for improved safety and longevity. Non-balance options are available for simple or low-current builds.
Nickel, Wiring & Tools
Is your nickel strip pure?
Yes. Our nickel strips are made from pure nickel (not plated), ensuring reliable conductivity and corrosion resistance. Available pre-cut or in rolls.
Do you sell tools for assembly?
Yes — we stock spot welders, soldering tools, IR testers, heat shrink, Kapton tape, and fish-paper insulation for safe and efficient pack building.
Safety
Always use proper tools, PPE, and knowledge when working with lithium-ion cells. Confirm polarity before welding or soldering, use insulation materials like fish-paper and Kapton tape, and always include a proper BMS.
For questions about parts or build safety, contact us before proceeding.
