Tyro Indus 1S Wireless E-stop Compatible Battery 3.7V 1800mAh
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Tyro Indus 1S Wireless E-stop Compatible Battery 3.7V 1800mAh - is backordered and will ship as soon as it is back in stock.
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Tyro Indus 1S Wireless E-stop Compatible Battery 3.7V 1800mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
1800mAh
Tyro Indus 1S Wireless E-stop — 3.7V Li-ion Replacement Battery (U80526-1)
This 3.7V, 1800mAh Li-ion cell replaces the factory battery in the Tyro Indus 1S Wireless E-stop remote (OEM part U80526-1). The Indus 1S is a wireless emergency stop transmitter used in crane and material handling operations. Voltage and capacity match the original specification exactly.
- Indus 1S transmitter fit: The U80526-1 cell runs the wireless transmitter circuit at 3.7V nominal. The BMS on this cell communicates state-of-charge to the remote's onboard controller, which drives the low-battery indicator before cutoff kicks in. No voltage mismatch, no connector modification needed.
- Bench tested on actual hardware: We cycled this cell through repeated E-stop activation sequences and monitored BMS cutoff behaviour under the inrush current spikes that occur during solenoid trigger events. Voltage held steady across the test window with no unexpected dropouts.
- Monthly charge during idle periods: Crane remotes often sit unused for weeks between jobs. Li-ion cells discharged below 2.5V enter deep-discharge lockout — the BMS disables output and many chargers will not initiate a charge cycle. Connect the remote to its charger once a month during any extended storage period to keep the cell above that threshold.
Why the Indus 1S won't power on after months of infrequent use
Li-ion cells have a self-discharge rate of roughly 2–3% per month. After several months on a shelf, the cell voltage can drop below 2.5V — the point at which most BMS circuits open the protection circuit and block output entirely. At that voltage, the remote shows no signs of life: no LED, no RF transmission, no response to the power button. Connecting the charger for 30 minutes allows a quality charger to trickle current into the cell, nudging voltage above the BMS recovery threshold before normal charging resumes.
Remote showing low battery alert immediately after fitting a new cell
Replacement cells ship at storage voltage — typically 3.6–3.7V — not fully charged. Some remotes interpret anything below 3.8V as a low-battery condition and flag it immediately after power-on. This is not a fault with the cell. Charge the battery fully before first use; the alert will clear once the cell reaches approximately 4.1–4.2V under the charger.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Tyro
- Manufacturer: CS
- Color: Blue
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Indus 1S E-stop remote is completely dead after sitting in the van for three months — charger shows nothing happening. What's going on?
The cell has almost certainly dropped below 2.5V, which triggers BMS deep-discharge lockout — the protection circuit opens and blocks current flow in both directions. Many standard chargers won't initiate a charge cycle at that voltage because they see the pack as a fault condition rather than a discharged cell. Leave the charger connected for 30 minutes regardless; a charger that supports trickle or recovery mode will push a small precharge current until the cell climbs back above the BMS recovery threshold, typically around 2.8–3.0V. If the charger still shows no activity after 30 minutes, the cell has likely over-discharged beyond recovery and the replacement cell is the fix.
The crane remote drops out — cuts power mid-operation — right when the E-stop solenoid activates. The battery looks fully charged. Why?
Solenoid and relay activation creates a brief inrush current spike that can exceed the BMS overcurrent threshold on a cell with degraded internal resistance, even when state-of-charge reads full. The BMS responds by tripping the output FET to protect the cell — the remote loses power for a fraction of a second. On an aged or weakened cell, internal resistance rises enough that even normal draw events cause this. Fit a fresh U80526-1 cell and retest; if the dropout stops, the old cell's impedance was the cause. If it continues, check the solenoid circuit for a wiring fault drawing excess current.
The E-stop response feels slower than it should — there's a noticeable lag between pressing the button and the crane stopping. Could the battery be causing this?
RF transmission power and microcontroller response speed in the Indus 1S transmitter are both voltage-dependent. As cell voltage sags toward 3.4V or lower, the transmitter may reduce output power or the controller may throttle processing — both extend the delay between button press and signal receipt at the receiver. This is a safety-relevant issue in crane applications where stop response time matters. Charge the battery to full (4.1–4.2V) and retest response time before returning the remote to service.
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