Protects your Lithium or Lithium Polymer battery packs from overdischarge
Installs easily between your receiver and ESC
Provides a voltage set with an easy-to-use potentiometer
The CellShield Lithium Battery Low-Voltage Cutoff is a low voltage cutoff device which provides cell-by-cell protection for lithium battery packs. By monitoring each cell individually, CellShield prevents cell overdischarge due to pack imbalance or cell variations.
The CellShield provides a soft cutoff when the lowest voltage cell of the pack reaches the set minimum voltage. The minimum voltage is adjustable from 2.5v/cell to 3.5v/cell. This lets you set the proper cutoff voltage for your specific pack. For example, 8-10C cells typically use a 3.0v/cell cutoff, while 20C cells work better with a 3.2v/cell cutoff. CellShield's cutoff voltage is set with an easy-to-use potentiometer. There are no programmers to buy or complicated programming procedures. With CellShield, you turn the arrow to the cutoff voltage you want and go fly.
The CellShield also features optional thermal probes (RB-Dim-15), which prevent pack damage due to overheating. When using the thermal probe, if the battery temperature rises above 150 degrees, CellShield will reduce the throttle command sent to the ESC in an attempt to bring the battery temperature back down. If the battery stays above 150 degrees Farenheint, CellShield will enter soft cutoff mode. When using the thermal probe, CellShield alerts the user to temperature faults by flashing the red Temp light. The thermal probes are extremely thin, and can often be inserted between the innermost cells of the pack, where pack temperature is highest.
The CellShield installs easily between your receiver and ESC. Simply plug the battery port on the CellShield into the tap connection on your battery, and it will automatically detect the number and cell order for any pack with .1" tap spacing. If you are running a battery with 2 mm tap spacing like Thunderpower, a 2 mm to .1" adapter is all that is required to use CellShield. CellShield will then light an LED corresponding to the detected cell. You can even plug the battery tap in "backwards" and in any position, and CellShield will operate correctly. No soldering is required to install CellShield.
The CellShield works with any ESC and power system except some opto-isolated ESCs when used with receiver batteries. For cell-shield to operate, the battery ground and radio ground must be at the same level. This is the case for all ESCs with a built in BEC (whether or not the ESC's BEC is being used) and all ESCs using external BECs.
WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov.
Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
