Model 1900R4

The 1900R4 is our 3.6 volt Renewable (Rechargeable) Power Source based on internal Lithium NMC cells. It will safely power any 3 volt self winding clock.  You will enjoy noticeably stronger winding with the 1900R4.  Traditional Label.  If you used one of our previous 1900R, R2 or R3 units produced between 2006-2023, it is time to consider upgrading to this reliable new technology. By now, your original Lead-Acid 1900R or R2 is far beyond its pro-rated life and will need to be replaced.

If you need other voltages, please Contact us for more details if interested.

The standard 1900R4 is supplied with knurled nuts.  If you prefer Fahnestock clips instead, please send us a note, or email us here after placing your order.  There is no extra charge on this unit for the Fahnestock upgrade.

Lithium NMC technology has improved considerably over the years and now represents the lowest self-discharge and one of the safest lithium technologies available. Its run time far surpasses the performance of alternative technologies.   The charging method results in the fastest charging No. 6; fully recharging in under 8 hours.  Many customers prefer rechargeable batteries to avoid potential issues with leaky alkaline cells, or don't want to replace internal batteries.

The capacity of the Model 1900R4 is 26 watt-hours, double that of the original 1900R or 1900R2.  We’ve found that a single 1900R4 will run a typical Style F Self Winding Clock Co. model in good condition for well over 1 year before requiring recharge.  Nothing is better for powering impulse-style or Hipp-Toggle self winding clocks (such as American Clock Co., New York Standard, Imperial, Gregory models) than the Model 1900R4.

Of course, the 1900R4 includes the plug-in wall adapter to charge the unit.

NOTE:  The Model 1900R3, now 10 years old, is considered a legacy product and is being retired.  In other words, it is now available by special order only.  Its replacement, the Model 1900R4, based on new Lithium NMC technology (the same family of technology that is used in Tesla and other electric cars), is available as of July 15, 2023.  The Model 1900R3 is simply legacy since the newer product will give equivalent performance and improve on inevitable age-related assembly, procurement and lead time issues which we have been fighting since 2020.

If you are an international customer outside the continental US, please contact us before attempting to order this product.

Important Note: Clock winders and synchronizers are built in batches once per month.  Please be prepared for a 3-4 week lead time on these. Timing products (such as the Model 1900S and 1900W series) require pre-shipment calibration and verification which requires time to validate quality performance (2 weeks).

Unless otherwise noted at Checkout, a handling fee of $5.00 is included in each order (also covers packaging material) in the continental United States. Therefore the total shipping number shown in Checkout is the sum of the actual fee (from the carrier, usually UPS) plus this handling fee. Our standard carrier is UPS 3-Day in the USA and UPS International outside the USA.

We try to maintain a policy of "no minimum order dollar amount," but handling fees cannot be avoided.

Policy on return shipping: Customer assumes responsibility for shipping and handling costs, regardless of reason. Restated: Customer pays for return shipping and handling in all cases, including warranty returns.

Ken's Clock Clinic reserves the right to adjust shipping fees or carriers to accommodate order size. If an adjustment is necessary you will be notified prior to shipment. This especially applies to international orders, although we strive to provide and adhere to best estimate possible at time of order.

Important Information and Warranty Terms

Prices are shown in U.S. Dollars (USD).

We make every attempt to provide information needed to choose the right product. We encourage you to contact us if in doubt. Restocking charge is 20% of product purchase price on most models. We do not pay return postage if you choose the wrong product. We no longer carry non-renewable batteries to avoid problems with returns.

If you change your mind and don't want the product, you will receive a store credit. We no longer issue refunds, for example, if you buy a set of batteries, the clock doesn't work, and you refuse our help on the movement. We are happy to exchange for another product with a 20% restocking fee and subject to our standard shipping policy.

We have terms on our generous warranty to avoid our generosity being exploited. We do NOT warranty product that has been disassembled, tampered with, modified, or abused. Our products are not hobby or experiment platforms and are not meant to be used for this purpose. You will pay replacement price if you modify or disassemble the product, damage it, then attempt to return it for warranty repair.

We strive to learn from any defective product. If a unit is modified or disassembled, this destroys the root cause traceability and an opportunity to improve product is lost.

There are some products (for example, the Model 1900WG-4.5V) which are non-returnable due to their low sales volume or custom nature. These are noted in the product description. Please contact us to verify application before purchase.

On-line purchases are processed securely. Credit card purchasing is available through this system. Please contact us if you wish to purchase via some other means.

Sales tax of 8.15% will be applied to residents of Colorado; or home office is based in Broomfield, CO.

What is covered by our 5 year warranty on Renewable Units:

• Internal battery holder
• Internal wiring and electronics, connectors (all products)
• Rechargeable Cell on 1900R units, subject to pro-rating.

The only products subject to pro-rating are the 1900R family rechargeables. With these, for every year from manufacture you will need to pay $10.00 plus return shipping to have it refurbished. The 1900R products are serialized for tracking purposes.

What is NOT covered by our 5 year warranty on Renewable Units:

• We do NOT cover the internal alkaline cells which are user replaceable.
• Any unit which has been tampered with or altered voids warranty.
• Return shipping is users responsibility.
• Products over 5 years old and any 1900R with a 1000 series serial number. If your 1900R with 1000 series serial number fails, we will happily replace it with a new Model 1900R3 at its normal purchase price. 1000 series units are now over 12 years from last manufacture.