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JVC SP-AD70 Replacement Battery 3.7V 1500mAh OJCJ-034

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From $23.99 USD $29.99
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Fits JVC SP-AD70, SP-AD70-A, SP-AD70-B portable speakers; replaces OEM battery OJCJ-034.
3.7V, 1500mAh lithium-polymer cell delivers full wireless playback capacity without external power constraints.
Connector seats flat into the battery slot with positive terminal facing outward; locking tab engages on both sides.
Bench testing showed the BMS accepted charge immediately on first insertion; voltage sat stable at 3.7V under sustained audio load.
On first use after installation, discharge the speaker completely below 20% before recharging — constant top-off charging causes fuel gauge drift and capacity fade on this Li-Po chemistry.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

1500mAh

JVC SP-AD70 Series — 3.7V Li-Polymer Replacement Battery (OJCJ-034)

This 3.7V, 1500mAh Li-Polymer battery replaces the original cell in the JVC SP-AD70 portable Bluetooth speaker. It fits the SP-AD70-A, SP-AD70-B, and SP-AD90 variants that share the same battery bay and connector. Swap it when playtime has dropped noticeably or the speaker no longer holds a charge.

  • SP-AD70 and SP-AD90 compatibility: These models share the same 3.7V single-cell architecture, connector footprint, and BMS handshake protocol — the same replacement cell works across the range without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SP-AD70 platform. The BMS accepted the cell cleanly, balanced correctly at full charge, and applied low-voltage cutoff at the expected threshold without triggering fault flags.
  • Monthly discharge cycle for SP-AD70 users: Let the speaker drain below 20% at least once a month before recharging. Constant top-off charging from 60–70% causes fuel gauge drift on the Li-Polymer cell and accelerates capacity fade over time.

Audio distorting before the battery indicator reaches empty

As a Li-Polymer cell ages, its internal resistance rises. Under the combined current draw of the amplifier and Bluetooth radio, terminal voltage sags faster than the fuel gauge can track. The amplifier clips before the indicator shows low battery, producing distortion that sounds like a speaker fault. A fresh cell with lower internal resistance eliminates the sag and restores clean output at full volume.

SP-AD70 not waking from USB charge after sitting unused

If the speaker sits uncharged for several weeks, the Li-Polymer cell can drop below the minimum voltage the USB charge circuit will accept — typically under 2.5V. At that point the charger sees the cell as a fault condition and refuses to initiate. Some units recover with a 5-minute trickle from a 5V USB source at low current before the main charge cycle kicks in. If the cell does not respond within 15 minutes of connecting USB, the cell has self-discharged past safe recovery and needs replacement.

Compatible Models

SP-AD70 JVC SP-AD70-A JVC SP-AD70-B SP-AD90 SP-AD90-B SP-AD90-BB SP-AD90-BW SP-AD90-W

Replaces Part Numbers

OJCJ-034

Technical Specifications

Voltage3.7V
Amp Hours1500mAh
Capacity1500mAh
Rate5.55Wh
Net Weight29g /1.02 oz
Gross Weight54g /1.90 oz
Approximate Weight54g /1.90 oz
Dimension 60.30 x 36.50 x 6.10mm

Product Highlights

  • Brand: JVC
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My JVC SP-AD70 shows full charge but audio starts breaking up after about an hour of use — is that a battery problem?

Yes, and it points to capacity fade from shallow cycling rather than a speaker fault. When a Li-Polymer cell is repeatedly topped off without ever fully discharging, the usable capacity shrinks and internal resistance climbs — the cell voltage sags under amplifier load long before the indicator reflects it. Run the speaker down below 20% once, then recharge fully, and check whether playtime recovers. If it does not improve, the original cell has degraded and a replacement cell will restore normal output.

Bluetooth keeps cutting out at high volume on my SP-AD70, but works fine at low volume — what's causing this?

High volume forces the amplifier to draw a sharp current spike, and the Bluetooth radio draws on the same cell simultaneously. If the cell's internal resistance is elevated, that combined load causes a brief voltage sag that drops below the radio module's minimum operating threshold and drops the connection. It is not a Bluetooth antenna issue — it is voltage sag under peak current. Replacing the cell brings internal resistance back down and eliminates the sag at high volume.

My SP-AD70 sat in a bag for two months and now won't charge at all — the USB light doesn't even come on. Can I recover it?

A deeply discharged Li-Polymer cell — typically below 2.5V — falls outside the acceptance window of the USB charge circuit, so the charger does not initiate and no indicator light appears. Connect the speaker to a 5V USB source and leave it for 15–20 minutes without pressing anything; some charge controllers will attempt a low-current pre-charge trickle to bring the cell back into range. If no indicator appears after 20 minutes, the cell has self-discharged past safe recovery and needs to be replaced before the charge circuit will respond.

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