StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai
C
CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro

CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro

Best price now

$15.88at AmazonChecked Nov 12

20% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

Visit Amazon

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Last seen at $15.88 at Amazon on Nov 12.
  • Checked at 4 stores.
  • Our take on the CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro

    The CS-THL400SL is a replacement rechargeable lithium-ion battery for Theradome laser helmets. It is a single 18650-size cell rated 3.7V and 2600mAh, and it cross-references Theradome's INR18650-1S1P part. It fits the LH40, LH80 and LH80 Pro, so owners of any of those helmets can restore a unit whose original cell no longer holds a charge. The main trade-off is capacity: 2600mAh is a common mid-range figure for 18650 cells, and higher-capacity cells of the same size exist, but they cost more and may not match the helmet's charging circuit.

    Best forOwners of a Theradome LH40, LH80 or LH80 Pro whose battery no longer holds chargReplacing a dead or degraded INR18650-1S1P cellKeeping an out-of-warranty helmet in use instead of replacing it
    Pros
    • Direct replacement for Theradome INR18650-1S1P
    • Fits LH40, LH80 and LH80 Pro
    • Standard 18650 cell size, widely understood format
    • 3.7V Li-ion chemistry matches the original spec
    • Light at 73 g
    Cons
    • 2600mAh is modest for an 18650 cell
    • Single cell only; no charger or tools included
    • Requires opening the helmet to fit, which voids remaining warranty
    • No protection circuitry stated

    CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro prices at every store

    • Batteries AmericaNew

      In stockReturn policy

      $18.95Checked Nov 12
      Visit Batteries America
    • Batteries N BulbsNew

      In stockReturn policy

      $19.95Checked Nov 12
      Visit Batteries N Bulbs
    • LIBERTY LIGHTINGNew

      In stockReturn policy

      $21.95Checked Nov 12
      Visit LIBERTY LIGHTING
    • AmazonNew

      Availability unknown

      As an Amazon Associate, Deal.ai earns from qualifying purchases.

      $15.88Checked Nov 12
      Visit Amazon

    Store links may earn us a commission.

    CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro price history

    Lowest price we've seen: $15.88 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.

    About the CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro

    The CS-THL400SL is a replacement rechargeable battery for Theradome products.

    This Li-ion battery has a 3.7V voltage and a 2600mAh capacity. It is compatible with the Theradome LH40, LH80 and LH80 Pro.

    Model
    CS-THL400SL
    Voltage
    3.7V
    Chemistry
    Li-ion
    Capacity
    2600mAh
    Dimensions
    68.00 x 18.90 x 18.90 mm
    Weight
    73 g
    Color
    Blue
    Compatibility
    Theradome LH40, Theradome LH80, Theradome LH80 Pro

    Questions and answers

    Will this battery work in my Theradome LH80 Pro?
    Yes. It is listed as compatible with the LH40, LH80 and LH80 Pro, and it replaces the INR18650-1S1P part number.
    Is this an original Theradome battery?
    No. It is a third-party replacement cell that cross-references Theradome's INR18650-1S1P. It is not made by Theradome.
    How long will one charge last?
    The cell is rated 2600mAh at 3.7V. Runtime depends on the helmet model and how the lasers are driven, so expect roughly the same session count as the original cell of the same capacity.
    Do I need tools to install it?
    The battery is a bare 18650-size cell, so you open the helmet and swap the cell yourself. No tools or charger come in the box.
    Can I use a higher-capacity 18650 cell instead?
    Physically yes, if it is the same size and chemistry, but the helmet's charging circuit is designed around the original cell. A mismatched cell can charge incorrectly or run hot.
    What are the dimensions?
    About 68mm long and 18.9mm in diameter, weighing 73 g. That is the standard 18650 format.
    Where is the CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro cheapest?
    At Amazon, for $15.88, 20% under what the other stores charge, as of our latest check.
    Where can I buy the CS-THL400SL Battery for Theradome LH40, LH80, LH80 Pro?
    4 stores we checked sell it, including Batteries America, LIBERTY LIGHTING, Batteries N Bulbs, Amazon.