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A MaxAmps LiPo 31000mAh 5S 18.5 volt battery pack
LiPo 31000 5S 18.5v Battery Pack
A MaxAmps LiPo 31000mAh 5S 18.5 volt battery pack
LiPo 31000 5S 18.5v Battery Pack
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LiPo 31000 5S 18.5v Battery Pack


Regular price $734.00
Regular price Sale price $734.00

Shipping calculated at checkout.



  • Assembled in the USA
  • Lifetime warranty
  • Lifetime USA customer support
  • ISO 9001, ISO 14001, NDAA compliant
  • Dangerous goods certified
  • Proprietary low temperature/high current MaxAmps assembly process
  • Factory fresh grade A cells
  • Voltage matched cells
  • Grade A pure copper wire(wire gauge depending on connector choice)
  • Silicone wire jacketing
  • Military grade assembly
  • Standard battery comes with Polyvinyl Chloride(PVC) outer layer
  • Your choice of connectors and wire length
  • Overnight shipping available
Brand MaxAmps Lithium Batteries
Capacity 31000mAh
Nominal voltage 5S 18.5v
Maximum voltage 21v
Minimum voltage 15v
Recommended landing voltage(air) 17.5v
Recommended cut-off voltage(ground) 16v
Chemistry Lithium-Polymer(LiPo)
Maximum continuous discharge 348.75 amps
Maximum charge current 155 amps
Watt hours 573.5 Wh
Energy density 203 Wh/kg
Main lead length(custom lengths available) 3.5"(89mm)
Balance lead length(custom lengths available) 3.5"(89mm)
Length 7.36"(187mm)
Width 5.35"(136mm)
Height 2.2"(56mm)
Weight 99.62oz(2824g)
SKU Lipo-31000-5S-Pack-5

Available upgrades:

Hard case aluminum-rubber composite  add 5mm to length, width, and height and 5% to weight
State of charge indicator
momentary push button led lights
add 6mm to length and 10g to weight
Built in balance lead
built into battery, eliminates exterior wires on balance lead
no added dimensions or weight
Internal self balancing
balances individual cells in battery pack internally
add 10mm to length and 9g to weight

bus communication
(150A Max)

add 13mm to length and 10g to weight
Custom configurations, additional functionality, and engineered drawings are available upon request.

Lifetime Battery Warranty

MaxAmps offers a one-time, non-transferable lifetime warranty on any battery with a factory defect. Batteries that fail from improper storage or a use error are not covered. Replacements only apply to products purchased from MaxAmps and does not cover any other loss.

WARNING:Do not charge unattended! The user must have an appropriate understanding of the potential dangers of lithium batteries before purchase and usage. No expressed or implied guarantee of compatibility, suitability, or fitness for any particular purpose or device can be made.

  • ONLY use with proper protection circuitry
  • DO NOT short circuit intentionally or unintentionally
  • KEEP AWAY from metal/conductive objects to prevent short circuiting
  • DO NOT use if battery, wrapper or terminal insulator is damaged or torn
  • DO NOT over-charge or charge above the maximum voltage rating
  • DO NOT over-discharge or exceed the continuous discharge rating
  • DO NOT modify, disassemble, puncture, cut, crush, or incinerate
  • DO NOT expose to liquids or high temperatures
  • KEEP AWAY from pets and children
  • ALWAYS charge in or on a fire-proof surface and never leave batteries charging unattended
  • ONLY use a smart charger designed for this specific type of battery
  • DO NOT mix and match brands and models, old and new, used and unused batteries
  • STOP immediately if while charging/storing/using the battery it emits an unusual smell, feels hot, changes color or shape, or appears abnormal in any way
  • It is your responsibility to determine that your charger or device is functioning properly
  • If exposed to battery electrolyte, flush with water immediately and/or immediately contact a physician or emergency services
  • DO NOT throw away in the trash; contact your local jurisdiction for proper recycling or disposal

If in the first 30 days, you are not completely satisfied, you can send your items back for a replacement or your money back. This does not include shipping charge and does not apply to custom built batteries. You pay the return shipping charge and we pay for the replacement to be sent to you.

Shipping Policy
For domestic US shipping, we ship via FedEx, UPS, or USPS. If you prefer a certain carrier, please specify in the notes on your order. We offer Standard 3-5 day shipping on orders to US locations. If you need it faster, we offer express 1-2 Day Express shipping. Contact us for Overnight shipping options. Because lithium batteries are considered dangerous goods, carriers do not guarantee overnight shipping, but they do offer it. In our experience, we have had a 90%+ success rate using overnight shipping.

For international shipping, we primarily ship via FedEx Priority but we also offer UPS Standard Ground to Canada. If your country is not listed on the website, we may still be able to ship to your country. You will need to contact us for a custom shipping quote. Be aware that our shipping costs cover postage and insurance on the package but not import costs such as duties, taxes, or broker fees.

Tracking details will be emailed at the time of shipment. Please allow time for the online tracking status to update.

We make every effort to ship within 24 business hours. If you need your order to arrive by a certain date, be sure to contact us directly and we will do our best to satisfy your request. For possible lost in transit shipments, please contact us immediately so that we can contact the carrier.

Some batteries must be shipped as fully regulated dangerous goods and will arrive to you with a 30% charge. We recommend charging up to 60-70% shortly after receipt. In addition, our lithium batteries have passed UN38.3 Testing making them safe for transport. This test summary can be viewed/downloaded via this link if needed. 

Privacy Policy
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Unless you ask us not to, we may contact you via email in the future to tell you about specials, announcements, or changes to this privacy policy. You can do the following at any time by contacting us via the email address or phone number given on our website: see what data we have about you if any, change/correct any data we have about you, have us delete any data we have about you, or express any concern you have about the use of your data.

Security: We take precautions to protect your information. Wherever we collect sensitive information, such as credit card data, that information is encrypted and transmitted to us in a secure way. You can verify this by looking for a closed lock icon at the bottom of the page you are on, or looking for “https” at the beginning of the address of the web page. While we use encryption to protect sensitive information transmitted online, we also protect your information offline. Only employees who need the information to perform a specific job (for example, billing, customer service, or shipping) are granted access to personally identifiable information. The computers and servers in which we store personally identifiable information are kept in a secure environment.

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Links: This website contains links to other sites. Please be aware that we are not responsible for the content or privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of any other site that collects personally identifiable information.

Updates: Our Privacy Policy may change from time to time and all updates will be posted on this page. This policy was last modified on 12/20/19.

If you feel that we are not abiding by this privacy policy, you should contact us immediately.

Terms of Service
User Agreement: This agreement is governed in accordance with the laws of the State of Washington. All users agree, through the use of this website, to the terms and conditions contained on this website. User hereby agrees to the exclusive jurisdiction in accordance to the courts of the State of Washington and any federal jurisdiction for any and all litigation. Please review all additional policies, such as the Privacy Policy, Liability Policy, Returns Policy, and Shipping Policy posted on this page. reserves the right to change or modify these policies at any time without prior notice.

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