Best Batteries for Wireless Mic Transmitters: XTAR vs Energizer vs Eneloop vs LADDA
4 AA batteries tested on Lectrosonics DBSM transmitters at 25mW and 50mW. See runtime, discharge curves, and which one actually lasts.
Article Summary: Four AA batteries — Energizer Ultimate Lithium, XTAR CLR 4300, Panasonic Eneloop Pro, and IKEA LADDA 2450 — tested on a Lectrosonics DBSM transmitter at 25mW and 50mW. XTAR CLR 4300 delivers 6-hour runtime at 25mW, just 35 minutes behind Energizer, while outperforming Eneloop Pro by 1.5 hours. With a 15-minute low-battery warning and 75% cost savings over single-use lithiums, it offers the best balance of runtime, rechargeability, and reliability for production sound mixers.
Estimated read time: 7 minutes
The Problem — “It’s Six Hours to Lunch”
If you work in production sound, you know the drill. You wire talent before they step on set. You can‘t touch them again until lunch. That’s a 4-to-6-hour window where the transmitter has to keep running. No excuses. No mid-take battery swaps.
For years, the industry standard has been Energizer Ultimate Lithium. It gets the job done. It lasts. But it‘s expensive — around $2.50 per cell — and it’s single-use. On an episodic TV show, battery costs can run $700 per week just for the non-rechargeable AA lithiums, according to one location sound mixer.
“I’ve seen the weekly cost on an episodic show and it was something like $700/week for AA lithiums.”
Then there‘s the rechargeable route. Eneloop Pro and IKEA LADDA are the go-to NiMH options. They save money over time. But they output only 1.2V, while alkaline and lithium batteries deliver 1.5V. That lower voltage means less headroom, shorter runtime at high transmitter power, and battery meters that don’t read accurately.
So the question is: Is there a rechargeable AA battery that delivers Energizer-like runtime, works at high transmitter power, and doesn‘t break the bank?
That’s what this test set out to answer.
Sources: Michael Wynne CAS livestream, jwsoundgroup.net discussions
The Comparison — 4 Batteries Tested on Lectrosonics DBSM
The test used a Lectrosonics DBSM single-battery digital transmitter — a popular choice among location sound mixers for its compact size and form factor. The transmitter was tested at multiple power settings, with 25mW and 50mW being the most relevant for film set use.
The four batteries tested were:
| Battery | Type | Voltage | Capacity |
|---|---|---|---|
| Energizer Ultimate Lithium | Single-use lithium | 1.5V | 3000mAh |
| XTAR CLR 4300 | Rechargeable 1.5V lithium | 1.5V | 2700mAh / 4300mWh |
| Panasonic Eneloop Pro | Rechargeable NiMH | 1.2V | 2500mAh |
| IKEA LADDA 2450 | Rechargeable NiMH | 1.2V | 2450mAh |
The test was conducted by Michael Wynne CAS, a production sound mixer and Cinema Audio Society member. Results were published in his live stream and accompanying Google Doc.
Source: Michael Wynne CAS / Lectrosonics DBSM transmitter test
Runtime Test Results — 25mW and 50mW
Here are the results for the two power settings most commonly used on film sets:
| Battery | 25mW Runtime | 50mW Runtime |
|---|---|---|
| Energizer Ultimate Lithium | 6h 35min | 4h 45min |
| XTAR CLR 4300 | 6h 00min | 4h 30min |
| Panasonic Eneloop Pro | 4h 30min | 3h 30min |
| IKEA LADDA 2450 | 4h 20min | 3h 25min |
Three key takeaways:
- XTAR CLR 4300 vs Energizer: Just 35 minutes behind at 25mW — a negligible gap for a rechargeable battery.
- XTAR CLR 4300 vs Eneloop Pro: Outlasts Eneloop Pro by 1.5 hours at 25mW and 1 hour at 50mW.
- XTAR at 50mW vs Eneloop at 25mW: The XTAR at 50mW (4.5h) matches the Eneloop Pro at 25mW (4.5h). Same runtime at double the power.
Source: Michael Wynne CAS test data
Why XTAR CLR 4300 Stands Out — The Discharge Curve Advantage
Runtime numbers tell only part of the story. How a battery behaves as it nears empty is just as important — especially on a film set.
The problem with most 1.5V rechargeable lithium batteries
Most 1.5V rechargeable lithium batteries hold that voltage steadily until the cell is depleted — then cut off abruptly. No warning. No low-battery indicator. Just sudden death.
“Other lithium brands will just go from full to dead without warning.”
How XTAR CLR 4300 is different
The CLR series maintains 1.5V throughout most of the discharge cycle, but when the battery approaches end-of-life, it transitions to a gradual linear voltage drop — similar to an alkaline or NiMH battery.
This means your transmitter‘s battery meter actually works. You see the bars drop. You get a warning.
Michael Wynne noted: “Once you get a battery alarm on your Lectro (RED), you’ve got approximately 15 minutes.”
Long-time XTAR user jimfoon confirmed: “When they drop to 1.2 or 1.1V with their BMS, you got 5-10 mins to swap that guy out.”
Why this matters on set
Fifteen minutes is enough to finish the current take, wait for a natural break, or call for a battery swap without stopping production. For a production sound mixer, that difference alone is worth the switch.
Sources: Michael Wynne CAS, jimfoon user comment
Cost Analysis — What‘s the Real Cost Per Shoot?
The following calculation is based on a 12-week episodic shoot: 5 days per week, 8 hours of active transmitter use per day = 480 total operating hours.
| Battery | Unit Cost | Runtime at 25mW | Batteries Needed | Battery Cost | Charger Cost | Total |
|---|---|---|---|---|---|---|
| Energizer Lithium | ~$2.00/cell | 6.6h | 73 cells | $146 | $0 | ~$146 |
| XTAR CLR 4300 | ~$6.50/cell | 6.0h | 4 cells (rotate) | $25.99 | $12.9 | ~$38.9 |
| Eneloop Pro | ~$4.94/cell | 4.5h | 4 cells (rotate) | $19.76 | $8.99 | ~$28.75 |
| IKEA LADDA | ~$3.00/cell | 4.3h | 4 cells (rotate) | $12 | $8.99 | ~$20.99 |
The bottom line: Over a single 12-week shoot, XTAR rechargeable setup costs 74% less than Energizer single-use lithiums.
One location sound mixer put it bluntly: “I‘ve seen the weekly cost on an episodic show and it was something like $700/week for AA lithiums.” That’s $8,400 over 12 weeks. The XTAR solution for a 10-transmitter kit costs about $260 upfront and $0 per week thereafter.
Sources: Michael Wynne CAS, sonicboompole2774 user comment
What Professional Sound Mixers Are Saying
“I have been using XTAR batteries since early 2024… I‘m not going back to eneloops as they discharge more than they say and also the actually good battery metering is just far too valuable on the XTAR but I’ll always keep a sleeve of Energizer Ultimate Lithiums on hand.” — jimfoon, production sound mixer
“We have had these around 6 months with zero issues. So far they have been running in Sennheiser and Shure mics, and Shure IEM’s.” — Shannon Landsberger, church AV tech
“They are truly 1.5 batteries instead of most of the others that are 1.2V. My mics use 2 of them, and if I would start with the normal 1.2V cheap rechargeables, I would already mis 2×0.3=0.6V directly from the start.” — Martin Boogaard, wireless mic user
Lectrosonics‘ official YouTube account commented on Michael Wynne’s livestream: “This is great info – thanks for sharing, Michael!”
Sources: Michael Wynne CAS livestream comments, Facebook Small Church Media group
Which One Should You Choose?
| If you need… | Choose this… | Why |
|---|---|---|
| Absolute maximum runtime + budget isn‘t a concern | Energizer Ultimate Lithium | Longest runtime. Single-use. Expensive long-term. |
| Rechargeable + longest runtime + low-battery warning | XTAR CLR 4300 | Matches Energizer within 15-35 minutes. 15-min warning. 1200+ cycles. |
| Lowest upfront cost | IKEA LADDA 2450 | Cheapest. But shortest runtime at high power. |
| NiMH industry standard | Panasonic Eneloop Pro | Proven reliability. But 1.2V means shorter runtime. |
For most production sound mixers, the XTAR CLR 4300 hits the sweet spot: rechargeable, long runtime, accurate battery metering, and low-battery warning — all in one package.
Learn more about XTAR CLR 4300 for professional audio →
FAQ
Will 1.5V lithium batteries damage my transmitter?
No. Wireless transmitters are designed to accept alkaline batteries, which measure 1.5V–1.6V when fresh. A regulated 1.5V lithium battery is well within the safe operating range of any professional wireless system.
How do I set the battery type on my transmitter for XTAR CLR 4300?
For XTAR lithium batteries, experiment with both the alkaline and Lithium settings on your transmitter. A user reported that the NiMH setting caused his device to fail to power on.
How long do XTAR CLR 4300 batteries last in a Lectrosonics transmitter?
6 hours at 25mW, 4.5 hours at 50mW. At 10mW, runtime extends to 6 hours 45 minutes.
Do I need a special charger for XTAR lithium batteries?
Yes — rechargeable AA lithium batteries require a 1.5V lithium-compatible charger. The XTAR L8 Pro supports both lithium and NiMH batteries and auto-detects the chemistry.
Conclusion
The data is clear. For production sound mixers running Lectrosonics transmitters on set, the XTAR CLR 4300 delivers:
- 6 hours at 25mW — enough to get from call time to lunch
- 4.5 hours at 50mW — matching what Eneloop Pro delivers at 25mW
- 15-minute low-battery warning — no sudden shutdowns
- 74% cost savings over Energizer single-use lithiums
Michael Wynne summed it up: “This particular system might be the future for my transmitters.”
For location sound mixers, rental houses, and broadcast engineers, the choice is straightforward.
View XTAR CLR 4300 for Location Sound →
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